I expected a foam cleaner to cling to the surface and start the cleaning action. This cleaner, although white like you'd expect for a foam, was runny and settled low on the area I wanted to clean. It did OK cleaning some of the residue in the shower corners.
this stuff works great! my shower had never been so clean! I will say it says no scrub and I still had to but not nearly as much as other cleaners. also the foaming aspect is kind of a pain because it comes out in 1 straight stream of foam. it should either be an aerosol fan or a regular sprayer to make it easier to use in large spaces like a shower.