1. Clean your toilet.
The solvents in WD-40 will help dissolve any gunk and lime in your toilet. Spray your toilet bowl for a couple of seconds and use a toilet brush to help scrub away the grime.
2. Remove crayon marks on walls and clothing.
Use WD-40 to remove crayon or marker from walls. (BUT, only use on walls with a sheen to the paint—the oil in WD-40 will stain matte or flat paints!) Wipe away the stain with a clean rag.
WD-40 will also remove marker and crayon from furniture and appliances!
3. Keep water stains off glass shower doors.