Originally Posted by chessplayer
I also use DPD for tough soap scum spots in the shower and tub. Seems to work much better than Tilex and such minus the bad smell of the typical bathroom products.
You know what else works well on tough soap scum in tubs is that Bleach White that's made for cleaning white wall tires. Spray it on, leave it and come back in a little while and it comes off easily. Sounds strange but it works!