My "go to" cleaner
I use this primarily for shower cleaning and it is the only sponge that will remove soap scum with ease, no elbow grease needed.  I put this on Amazon subscription because they are used regularly in my house, not only for bathroom, but walls, scuff marks on the floor, grubby prints on stair railings.  I can use at least 2 or 3 times to clean the shower before it falls apart.
Rating: 5 stars