One of my least favorite chores is cleaning the tub and shower. I found this simple easy to make spray. All you need is a spray bottle and equal parts white vinegar and blue dawn (store brand works just fine). I pour 3 oz of dawn into bottle I then take 3 oz of vinegar and heat in microwave. Carefully pour vinegar into bottle swish it around, attach sprayer. Spray shower and tub and let sit for 30 minutes. Generously rinse with warm water. Sometimes you may have to scrub some spots but I rarely have to do that. Very important before you step into tub or shower make sure there is no more soap, be thorough. I know that once you see the results you will never buy a store product again.