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How to clean mahjong tiles
without damaging the print.

Most cleaning advice for mahjong sets is written for automatic tables or for plastic that has no print on it. American sets are different: the face is painted or printed, and the engraved grooves hold whatever liquid you put near them. This guide is for those tiles.

Why the wrong cleaner matters

An acrylic tile is a laminate of a coloured core and a printed or painted face. The print sits close to the surface. Alcohol — in hand sanitizer, disinfecting wipes, glass cleaner and most baby wipes — is a solvent for the binder in that print. It does not remove the whole character in one wipe. It softens the edge, dulls the colour, and after a season of cleaning the face looks faded in exactly the places that get touched most.

Ammonia does something different: it attacks the acrylic itself, leaving a haze that cannot be polished out. Wax and silicone products fill the engraved grooves with a film that traps dust, so the tiles feel tacky again within a week — which is usually why people reach for a stronger cleaner, and the cycle gets worse.

If a product is designed to disinfect a kitchen counter, it is not designed for a painted tile face.

The short version: do and don't

DoDon't
Wipe with a dry microfiber cloth after playUse alcohol, sanitizer or disinfecting wipes
Brush the engraved characters with a soft brushSoak, rinse or submerge tiles in water
Use a pH-neutral, alcohol-free foam cleanerSpray glass cleaner or ammonia on the face
Air tiles for a minute before they go back in the caseApply wax, silicone or furniture polish
Test an inconspicuous tile on vintage setsClean flaking paint — stabilise it instead

The five-minute routine

This is the routine our kits are built around. It works on acrylic, melamine and resin faces, and it takes about five minutes for a full four-player set.

  1. Clear and dust. Empty the rack. Wipe each tile with a dry cloth using light pressure. This removes chalk, lint and snack crumbs before they become a paste.
  2. Clean the face. One pump of foam onto the cloth — never onto the tile. Work the engraved characters with a soft brush, then wipe the face once, in one direction. Do not scrub in circles; the print does not need abrasion.
  3. Polish and store. Finish with an anti-static cloth. Let the tiles air for a minute before they go back in the case so no moisture is trapped against the print.

How often, really

A home set that plays weekly needs a wipe-down after each session, a full dry polish once a month, and a foam clean quarterly. A club set is a different problem: a single evening can put more hand cream and lipstick on the tiles than a home table sees in a year, so club sets should be cleaned after every session and rotated through a wash cycle for the cloths.

If the tiles feel sticky rather than dusty, that is oil, not dirt — go straight to the foam step. If the face looks cloudy and the cloth comes away clean, the damage is in the material, not on it, and cleaning will not reverse it.

Vintage and hand-painted sets

Older sets may use a lacquer or hand-painted finish that is more fragile than modern print. Test one tile on an edge you do not look at. If colour lifts onto a dry cloth, stop and clean with dry cloths only. Never use a foam cleaner on a tile where the paint is already flaking — the surfactant will wick under the loose edge.

Storage and the case

Most damage we see is not from cleaning at all — it is from storage. A closed case traps humidity against the print, and a case that has been in a car or an attic can reach temperatures that soften acrylic. Let tiles reach room temperature before play, keep the case dry, and put a cloth between stacked racks if the case allows it.

A note on claims. Our foam cleaner is a cleaner. It is not a disinfectant, and we do not make sanitizing or antibacterial claims. It removes oils, chalk and cosmetics — that is the job it is formulated for.
Care questions

The ones we hear most.