The glass is an important part of the art’s preservation; cleaning the glass improperly can cause moisture to collect, and mold to form.  First try wiping the dust away with a magnetic wiping cloth, or another soft, lint-free cloth that will not scratch.

If you must use a cleaner to wipe away fingerprints or smudges, follow these tips:

• ​​Always spray the rag NOT the glass. This maintains the integrity of the art because the liquid from the glass cleaner will not dribble down and collect at the bottom of the glass. When the glass is sprayed, frequently, the liquid becomes trapped between the frame and glass that can damage the matting and artwork.

• An ammonia free cleaner should be used; especially on Museum Glass where the harshness of the ammonia would damage the finish of the glass.