We have an acrylic tub/shower combo and glass shower doors. With 2 teens everything was getting pretty scummy. After lots of elbow grease and Soft Scrub got it clean, we started to use a scrubbie (like the ones made for cleaning pots and pans - sponge on one side, rough plastic on other side) with cheap liquid dish soap to wipe down after every shower - takes a minute, but keeps everything "unscummy".