Who said Rocks don't move? #2

Keep your artworks out of direct sunlight. Do not lean anything against the surface of a canvas. Dust your artworks with a clean, soft rag occasionally to prevent dust buildup. Don't use cleaning products or water! Hang your artworks away from very busy and possibly messy areas. Try to avoid subjecting your artworks to extreme changes in atmosphere. Avoid excessive dryness, humidity, heat or cold. Do not frame artworks on canvas under glass, because canvas needs to breathe, if it is framed under glass you may trap moisture inside the frame. Canvases experience small, subtle shifts over time due to mild atmospheric changes, so it is best to leave them without glass to allow them to flow with these slight changes.