Oven Cleaner Into a spray bottle mix: 2 oz. Dawn Dishwashing liquid 4 oz. Lemon Juice 8 oz. White Vinegar 10 oz. Water Now make your house sparkle! *Please test it first before using on delicate surfaces. This is powerful stuff! If your shower has a bad build-up of soap scum and crud it may take a time or two to get that shine.