After years of being annoyed with leaves and dirt and other garden debris clogging my watering can spout, I finally did something about it. I used an old coat hanger to rig a frame that outlines the opening of my watering can. The frame connects to the base of the can’s handle.
I wrapped a piece of old window screen around the frame, and — voilà! — no little bits of gunk falling into the can, and no mosquitoes laying their eggs in there either!