Rubbing alcohol
Hand sanitizer
Dry-erase marker over Sharpie, then wipe
Magic eraser
Baking soda paste
Toothpaste
Nail polish remover
White vinegar
Hairspray
Lemon juice
Dish soap and warm water
Coconut oil or olive oil
Laundry detergent
Acetone on non-delicate surfaces
Test on a small hidden area first