One of the best ways to keep your showers clean is to spray a mild cleaner after every use. There are several brands you can buy at the store, but you can save money by making your own at home. Just mix 1 cup rubbing alcohol and 3 cups water in a spray bottle. If you have hard water it is best to use distilled water. Just spray all over your shower when you are done, no wiping required. This works best after you have given your shower a good cleaning and can double the amount of time before your next cleaning.