You can easily remove dust and loose dirt by brushing it with a soft cloth or using a vacuum cleaner attachment designed for
cleaning upholstery or walls. Make sure to clean in one direction only –this will prevent rubbing the dust into the surface
of the ceiling.
For pencil marks, smudges, or clinging dirt, use an ordinary art gum eraser. Another option is to use a good grade wall cleaner.
For a more thorough cleaning, dampen a cloth or sponge in water containing mild soap. Wring out the cloth or sponge and wipe
off the ceiling tiles or panels. After washing, remove the soapy film residue with a different cloth or sponge, slightly dampened
in clean water.