I live in central Florida and we have a lot of limestone here plus mildew due to humidity so I was always scrubbing. I installed a shower curtain with the rod across the door. When showering I pull the curtain across the shower door so it doesn't get wet. I also keep a chamois-type cloth (like the ones you use on cars) in the shower. After a shower I take a minute to rub down the walls and fixtures. Seldom have to scrub now.