Take 1/2 cup white distilled vinegar (I brew mine in a jar for four weeks with orange or lemon rinds to make citrus vinegar) and heat it in the microwave until hot. Add a generous squirt of clear liquid dish soap and stir. Put it in a spray bottle and spray shower. Let sit 1-2 hours and it just wipes off with a wet rag. Rinse with water. NO Scrubbing!