Nothing about soap scum feels clean. The name is somewhat of a misnomer because soap only makes up part of this sticky grayish or yellow substance. Soap scum forms when the minerals in hard water ...

Wet down the tub, then generously sprinkle Bar Keepers Friend on the surface. Use a sponge to lightly scrub and apply the paste all over the tub. Wait 15 to 30 minutes, then scrub the tub again with a ...