Wipe with a dry clean cloth.
Avoid wet wiping or cleaning with water.
Chlorinated bleach is recommended whenever mold occurs.
If dust on the surface becomes noticeable, wipe it off gently with a disposable handy mop or similar implement.
Light marks left by handprints and pencils, for example, can be rubbed off with a plastic eraser.
Depending on the frequency of smoking, a tightly wrung, clean cloth may be used for wiping such stains.