If you have hard water like we do, you know about the nasty, very hard to clean soap scum that forms when you shower in that hard water. I would post a before picture, but I don't want to disgust you with the nastiness.
Instead, I'll share a picture of the miraculous new shower cleaner I found:
First thing this morning I sprayed down the shower liberally with oven cleaner. I coated every inch of soap scum. And then I walked away. I stayed away for about 6 hours while I cleaned the rest of the house. When I finally got back to the shower, I turned on the water to wet it down and start scrubbing. To my amazement, just the water hitting the coated soap scum started washing it off the walls! I took my scrub brush to it as well and all it took was a single swipe to wipe away the soap scum and oven cleaner. It just wiped right off! Usually a lot of elbow grease is required. I was seriously done in about 5 minutes. A few minutes with the brush, a minute to thoroughly rinse it all down, and done! This stuff is awesome!