TL;DR
Paint sheen decides how much cleaning a wall can survive. Flat and matte paint has almost no protective binder at the surface, so scrubbing burnishes it -- leaving a permanent shiny patch that repainting is the only fix for. Eggshell tolerates gentle washing, satin and semi-gloss tolerate real washing. Always test in a hidden spot first, and always start with the gentlest method.
Sheen is a durability rating in disguise
Paint sheen describes how much light the surface reflects, but what actually creates that reflection is the ratio of binder to pigment. More binder means a harder, glossier, more washable film. More pigment means a flatter, softer, more porous surface.
So sheen is really telling you how much abrasion the paint can take. Flat paint hides wall imperfections beautifully and cleans terribly. Semi-gloss shows every drywall flaw and wipes down like a countertop. That trade is why builders put flat on ceilings and semi-gloss on trim.
Source: paint manufacturer product durability documentation.
What each sheen can take
| Sheen | Washability | Approach |
|---|---|---|
| Flat / matte | Very low | Dry dust; blot only; expect touch-up paint |
| Matte enamel | Low to moderate | Gentle damp wipe, no pressure |
| Eggshell | Moderate | Damp cloth, mild solution, light pressure |
| Satin | Good | Washes well with mild solution |
| Semi-gloss | Very good | Handles regular washing |
| Gloss | Excellent | Handles washing and mild degreasers |
Newer premium paints blur these lines, and some matte products are formulated to be scrubbable. If you know the product line on your walls, look up its washability rating rather than assuming.
Burnishing: the damage most people cause
Burnishing is when rubbing polishes a flat or matte surface, leaving a shiny spot that looks worse than the dirt you removed. It happens because you have physically smoothed the microscopic texture that made the paint look flat.
It is permanent. No amount of further cleaning restores a matte look, and touch-up paint in that spot usually flashes differently. On flat paint the only reliable fix is repainting the whole wall, corner to corner.
That is why the rule on flat paint is blot, never scrub, and accept that some marks are a paint problem rather than a cleaning problem.
Always test in a hidden spot
Behind a door, inside a closet, low behind a piece of furniture. Apply your solution there exactly the way you plan to on the visible wall, let it dry fully, and look at it in daylight.
You are checking three things: whether the paint lifts or transfers onto your cloth, whether the sheen changes, and whether a clean ring appears at the edge of the wet area. Any of those means stop and use a gentler approach.
The gentle-first order
Start dry. Vacuum the wall with a soft brush attachment or wipe it with a dry microfiber cloth, top to bottom. A surprising amount of what looks like a dirty wall is dust, and removing it dry avoids turning it into mud.
Then go to plain warm water on a barely damp microfiber cloth. Wring it out hard. Blot or wipe lightly in a small area and dry immediately with a second cloth.
If that is not enough, add a very small amount of mild dish soap to warm water. Wipe, then go back over the area with a plain-water cloth to remove the soap, then dry. Leaving soap on paint creates a dull film that attracts dirt.
Only if that fails should you reach for a stronger cleaner, and only on satin or glossier paint.
What to avoid on painted walls
Degreasers and strong alkaline cleaners cut grease well and also cut into the paint film, dulling gloss and burnishing flat paint immediately. Save them for a kitchen wall in semi-gloss, and rinse thoroughly.
Melamine sponges are a very fine abrasive. They work because they sand, which means on any sheen below satin they remove the paint surface along with the mark. That trade-off is covered in removing scuff marks without sanding the sheen.
Never combine bleach with ammonia or with any acid. Many glass cleaners contain ammonia, and wall cleaning often happens with two bottles on the same drop cloth. Use one product at a time and ventilate.
Also avoid soaking. Water running down a wall leaves streaks that dry visibly, and water that reaches an outlet, a switch, or a nail hole is a genuine problem.
Work top to bottom, in sections
Drips run downward, and a drip on a dirty wall leaves a clean streak that is hard to blend. Working from the top means any runs land on wall you have not cleaned yet.
Do one wall at a time in sections about three feet square, drying each before moving on. Keep two cloths going, one for cleaning and one for drying, and change them the moment they turn gray.
While you are working a room, the trim, doors, and baseboards usually need attention at the same time, and they take a different approach because they are almost always a harder sheen. See handprints on door frames and trim and cleaning baseboards.
Specific marks
Grease near a kitchen or a light switch needs a mild soap solution and patience rather than pressure. Scuffs from furniture and shoes often lift dry with an eraser. Crayon has its own approach, covered in getting crayon off walls.
Water stains, brown rings, or a patch that keeps coming back after cleaning are not dirt. Those point at a leak, and cleaning them repeatedly hides a problem that needs a plumber or a roofer. If a wall shows persistent dark growth in a damp area, that is a moisture problem to be assessed by a remediation professional rather than scrubbed away.
Textured walls change the method again, since texture traps dust and breaks under pressure -- see cleaning textured walls.
FAQ
Can you wash flat paint walls?
Barely. Flat paint has little binder at the surface, so wiping tends to burnish it into a permanent shiny patch or lift pigment onto your cloth. Dust it dry, blot spots with a barely damp cloth, and plan on touch-up paint for anything stubborn.
What is the best cleaner for painted walls?
Warm water with a very small amount of mild dish soap, applied on a well-wrung microfiber cloth and rinsed off with a plain-water cloth. Stronger products risk dulling the sheen, and most wall soil comes off with the mild version.
Why did my wall get shiny where I cleaned it?
That is burnishing -- rubbing physically smoothed the surface texture of a flat or matte paint. It is permanent and cannot be cleaned back to matte. Repainting the full wall is the only reliable fix, which is why gentle methods come first.
Can I use a melamine sponge on walls?
Only on satin or glossier paint, and even then lightly. Melamine sponges work by fine abrasion, so on flat, matte, or eggshell paint they remove the paint surface along with the mark and leave a visible dull or shiny patch.
How often should walls be washed?
Most walls need a dry dusting a few times a year and spot cleaning as marks appear. Full washing is usually a pre-paint, pre-move, or annual deep-clean task rather than a routine one, and over-washing shortens paint life.
Should I wash walls before painting?
Yes. Paint does not bond well to dust, grease, or soap residue. Wash with a mild solution, rinse with plain water, and let the wall dry completely. In kitchens especially, degreasing before painting prevents adhesion failures later.
The whole-house equivalent of this routine is covered by house cleaning services.
Walls are the largest surface in a house and the one most often damaged by cleaning rather than by use. Every home is different, so what a full clean takes depends on size, condition, and what you want covered. Get a quote and we will walk you through it.