Seal it Up
Seal the paint can properly before you put it away to keep the paint from drying up. If any paint has gotten in the grooves of the paint can wipe it with a clean rag. Use a rubber mallet to tap the lid down securely. Don’t use a hammer – it can distort the lid, making it more difficult to securely seal the can. If you don’t have a mallet, you can cover the can with a piece of wood and then hammer the lid closed.