How to clean countertops by material: granite, marble, quartz, quartzite, soapstone and porcelain

For daily cleaning, almost every countertop needs the same thing: warm water, a few drops of mild dish soap or a pH-neutral stone cleaner, a soft microfiber cloth, a rinse with a clean damp cloth, then a dry wipe. The materials differ in what they can't take. Acids like vinegar and lemon etch marble, limestone and travertine, and wear down the sealer on granite and quartzite. Bleach, strong alkaline cleaners, solvents and heat damage the resin in engineered quartz. Abrasive powders and pads dull the polish on all of them. To disinfect, 70% isopropyl alcohol is safe on every stone and quartz countertop.

Why cleaning rules differ between materials

A countertop cleaner can do four kinds of harm, and each material is exposed to a different mix of them.

1. Etching. Acid dissolves calcite, the mineral in marble, limestone, travertine, onyx and some mislabeled "quartzites". The result is a dull, slightly rough mark. It is damage to the surface, not dirt, so no cleaner removes it. True granite and true quartzite don't contain calcite and don't etch from kitchen acids.

2. Sealer wear. Natural stone is slightly porous and is usually protected by a penetrating sealer inside the pores. Acids, bleach and ammonia break that sealer down faster. The stone looks fine until it starts soaking up oil and wine. See sealing natural stone.

3. Resin damage. Engineered quartz is about 90 to 93% crushed quartz held together by polymer resin. The quartz is tough. The resin is the weak point: strong alkalis, bleach, paint strippers, acetone left sitting, and heat from about 300°F (150°C) can leave permanent white, yellow or hazy patches.

4. Abrasion and residue. Scouring powders, green scrub pads, steel wool and melamine sponges (Magic Eraser) scratch polished surfaces into a dull haze. Cleaners that aren't rinsed off leave a film that looks like damage but isn't.

A word on pH. The pH scale runs from 0 (strong acid) to 14 (strong base), with 7 neutral. Each step is ten times stronger than the last. White vinegar is about pH 2.5, lemon juice about 2, plain dish soap in water about 7 to 8, ammonia glass cleaner about 10 to 11, and household bleach about 11 to 13. That is why "it's only vinegar" isn't a small thing on marble. A cleaner labeled "pH neutral" or "safe for natural stone" sits near 7.

The daily routine for any countertop

1. Brush crumbs and grit off first. Grit dragged under a cloth scratches.

2. Wipe with a microfiber cloth wrung out in warm water with a few drops of mild dish soap, about a teaspoon per quart. Or spray a pH-neutral stone cleaner.

3. Wipe again with a second cloth dampened in clean water. This takes off the soap film, which is the most common cause of streaks and dullness.

4. Dry with a dry towel. Water left to evaporate leaves mineral spots, especially if you have hard water.

5. Soften dried-on food with a warm wet cloth for 5 to 10 minutes and lift it with a plastic scraper, never metal.

Blot spills of oil, wine, coffee and juice as soon as you see them, rather than wiping, which spreads them. On marble and limestone, rinse any acid spill with water right away.

Quick reference by material

Granite

Granite is hard (Mohs 6 to 7) and doesn't etch from kitchen acids, so it is forgiving. The thing to protect is the sealer.

• Daily: the routine above. Plain dish soap is fine. Purpose-made granite sprays cost $5 to $15 a bottle and add convenience, not protection.

• Deep clean: an occasional pass with a mildly alkaline stone cleaner (pH 9 to 10) cuts built-up grease. Rinse it well.

• Avoid: vinegar and citrus cleaners, which break the sealer down with repeated use and can dull granites with calcite inclusions. Also avoid routine bleach and ammonia glass cleaners, which wear sealer faster, and abrasive powders and pads, which scratch the polish. An occasional Windex wipe won't show. Daily use shortens the time between reseals.

• "Granite polish" sprays that leave a wax or silicone shine build up into a smeary film and block the next coat of sealer. Skip them, or use them only on polished stone that has already been sealed.

• Leathered and honed granite trap grease in the texture. Use a soft nylon brush with the soapy water, and don't use polish products, which fill the texture and then flake.

Marble, limestone and travertine

These are calcite stones, soft (Mohs about 3 to 4) and acid-sensitive. Most marble "damage" is really etching from the wrong cleaner or a lemon wedge.

• Daily: warm water, then a pH-neutral stone cleaner or a single drop of plain, non-citrus dish soap per quart. Rinse and dry every time.

• Avoid: vinegar, lemon, "natural" citrus cleaners, and most bathroom, tile and grout cleaners, which are often acidic. Also avoid disinfecting sprays that list citric or other acids, bleach, ammonia, powdered cleansers, Bar Keepers Friend (oxalic acid), and scrubbing with dry baking soda.

• Honed marble shows etch marks less than polished, but it absorbs faster and shows oily fingerprints sooner. Clean it the same way and keep it sealed.

• Already etched? Rinse right away to stop the reaction, let it dry, and look under side light. Shallow marks on polished marble may buff out with a marble polishing powder. Deeper ones need a restoration pro. See marble etching and restoration.

Quartzite

True quartzite is quartz sandstone fused under heat and pressure. It is as hard as granite and doesn't etch, so clean and seal it like granite. The catch is that some stone sold as quartzite is really dolomite or marble. It etches, and it needs marble care.

If you don't know which you have, do the acid test on a hidden spot: a few drops of lemon juice or vinegar, wait 5 minutes, wipe and look for a dull spot under side light. Until you know, treat the stone as marble. See quartzite.

Engineered quartz

Quartz needs no sealing and shrugs off most food stains, but its resin is sensitive to chemicals and heat that stone would ignore.

• Daily: warm water with a few drops of mild dish soap, a clean-water rinse and a dry wipe. Most dull or streaky quartz is just soap or spray-cleaner residue, which comes off with a damp cloth.

• Cleaner strength: stay near neutral. Manufacturers' allowed ranges differ by brand, and the strictest currently ask for about pH 5 to 8. Check your brand's care guide.

• Bleach: brands differ. Some allow a brief diluted bleach wipe followed by a thorough rinse, others say not to use it at all. None allow routine bleach use, and undiluted bleach can leave permanent light or yellow spots. Use isopropyl alcohol instead.

• Never: oven cleaner, drain cleaner, paint stripper, heavy alkaline degreasers or nail polish remover left sitting. Avoid steel wool, green pads and melamine sponges. And never seal it.

• Hard water: use a limescale remover labeled safe for engineered stone, not vinegar or CLR-type descalers.

• Heat and sun: these aren't cleaning issues, but they cause most quartz "stains" that won't wash off. A hot pan or a slow cooker can scorch the resin. Years of direct sun through a large window can yellow light colors. Use trivets and window shades. See quartz.

• Warranty: quartz warranties exclude damage from improper cleaning products and heat. If a surface problem appears, the first question on a claim is usually what was used on it.

Soapstone

Soapstone is soft but dense and chemically inert. It doesn't stain from wine or oil and isn't etched by lemon or vinegar. It's the easiest natural stone to clean.

• Daily: any mild dish soap and water. No special stone cleaner is needed.

• Oiling: food-grade mineral oil evens out the natural darkening. It's cosmetic, not protection. Wipe on, wait 20 to 30 minutes, wipe off the excess. New tops get oiled every few weeks for the first months, then as often as you like the look.

• Hard-water spots: a cloth dampened with white vinegar, then a rinse. This is the one stone where that's fine.

• Scratches: sand out light scratches with 220-grit paper, then re-oil. Avoid abrasive powders and pads, and wax or silicone sprays, which leave a film.

Porcelain and sintered stone

Porcelain slabs and sintered surfaces like Dekton and Neolith are fired at very high temperatures and absorb almost nothing. They tolerate most household cleaners, including diluted bleach, and don't need sealing. Clean with soap and water or any non-abrasive cleaner. The only caution is to avoid abrasive powders on polished finishes, which can dull the gloss over time. Matte finishes can pick up gray marks from metal pans. They usually come off with a mild cream cleanser the manufacturer approves.

Laminate, solid surface and wood

Laminate and solid surface (Corian and similar) take soap and water and most household cleaners. Laminate can't be repaired once it's scratched or burned, and water left at seams and around the sink can swell the particleboard underneath. Solid surface scratches easily, but light scratches sand out. Butcher block has its own routine of oiling and spot-sanding. See wood countertop care.

How to disinfect a countertop without damaging it

For normal food safety, washing with soap and water and drying removes most germs from any countertop. Use a disinfectant after raw meat or poultry, or when someone in the house is sick.

• 70% isopropyl alcohol is the safe choice for every stone and quartz. Buy it at 70%, or dilute 91% rubbing alcohol with water. Spray it, leave it wet for the contact time on the label (usually 30 seconds to a few minutes), then wipe. It evaporates without residue and doesn't harm sealer or resin with occasional use.

• Quaternary ammonium sprays and wipes (the active ingredient in many household disinfecting products) are generally fine on quartz, porcelain and sealed granite for occasional use. Rinse surfaces that touch food.

• Clorox Disinfecting Wipes are bleach-free. The active ingredient is a quaternary ammonium compound. Clorox says they can be used on sealed granite but not on untreated stone. Stone trade guidance is more cautious. Many disinfecting wipes and sprays include acidic ingredients, and daily use wears sealer down. Check the ingredient list, and don't use them routinely on marble, limestone or travertine. Clorox also sells a separate wipe "with bleach", which should stay off stone and quartz.

• Bleach solutions kill germs but degrade stone sealer and quartz resin. If you do use one, dilute it as the label directs for surfaces, keep contact brief and rinse. Never mix bleach with ammonia or acidic cleaners, which releases toxic gas.

• Hydrogen peroxide (3%) disinfects and is generally safe on quartz and light granite for short contact. It can lighten dark stone over time.

Products to avoid, and why

When the countertop looks hazy or spotted

Haze has several causes, and the fixes are opposite, so identify it first. Wet the dull spot with water.

• Haze disappears when wet and returns when dry: fine scratches or etching. No cleaner will help. It needs polishing. See polishing and resurfacing.

• Haze stays visible when wet: something is sitting on the surface. It could be soap film, hard-water scale, dried sealer or a polish product.

Then match the fix:

Drying the counter after each wipe prevents most hard-water marks. Where water is very hard, keep a dry towel by the sink.

For fabricators

Most cleaning callbacks happen because the customer used what they always used on the old laminate.

• Hand over a care sheet specific to the material at install. Name the products, not just "harsh chemicals": vinegar, bleach sprays, disinfecting wipes on marble, powdered cleansers, oven cleaner on quartz. People follow "don't use Windex" far better than "avoid alkaline cleaners".

• Tell them what to use, too. Dish soap, a named pH-neutral stone cleaner, and 70% isopropyl alcohol for disinfecting cover almost every household.

• Explain the warranty link. Quartz and many fabricator warranties exclude damage from improper cleaners and heat. Saying so at install is cheaper than arguing about it later. See warranties and claims.

• Check the sink caulk on service visits. A 100% silicone bead at the sink and backsplash typically lasts 5 to 10 years. Cracked caulk lets water into the cabinet, and moldy caulk gets blamed on the stone.

• Leave it clean. Clean with isopropyl alcohol before final sealing and handover. Polishing compound or soap residue left on the surface shows up as haze a week later and turns into a callback.

FAQ

Is Dawn dish soap safe on granite and marble? Yes, in small amounts. A few drops per quart of water, followed by a clean-water rinse, won't hurt stone or sealer. Too much soap left on the surface builds a dull film, which is why the rinse matters.

Can I use a magic eraser on my countertop? Not on polished stone or quartz. Melamine foam is a fine abrasive and dulls a polished surface over time. It is sometimes acceptable on matte quartz or porcelain if the manufacturer allows it. Test a hidden spot first.

What about hydrogen peroxide? 3% peroxide is fine for occasional disinfecting on quartz and light stone. It can slowly lighten dark granite and marble. It is also used, at higher strength, in stain poultices. See stain removal.

How often should I deep clean a stone countertop? Most kitchens do fine with the daily routine plus a monthly pass with a pH-neutral stone cleaner, and a water test for sealer once or twice a year. Busy kitchens with hard water may need a hard-water treatment more often.

Are "granite" cleaners safe on quartz? Most pH-neutral granite and stone cleaners are safe on quartz, despite the name. Check the label for acids, bleach or strong alkalis, and avoid anything that promises to "seal" or "polish".