Tub Cleaner- vinegar and dish soap, requires no scrubbing! Heat 1/2 cups of white vinegar in microwave for 90 seconds, pour into spray bottle. Add 1/2 cups of BLUE Dawn dish soap, shake gently to mix. Spray on surface, let it sit 1-2 hours. Just wipe it away then rinse with water. Should also take soap scum off shower doors!