Regarding acrylic prints, we recommend a gentle clean with some dish washing detergent and warm water. Use a clean microfiber cloth. To quickly get rid of more persistent greasy marks you can also use methylated spirits which is available from all hardware stores. Lastly, avoid using glass cleaners (such as Windex) as they may contain ammonia which can be damaging to acrylic. Regular cleaning of canvases should be limited to dry dusting. If necessarily, canvases may periodically be cleaned with a lightly damp cloth to give a more thorough clean.