How did this cabinet and wall get so dirty?

Beats me, but I'm just happy as hell to clean it since I got my new
Scotch-Brite Easy Erasing Pads!

In fact, I apparently don't even have to make contact with the wall!  I just wave the sponge past it, and dirt is gone, and big, comical sparkles appear!

In fact, the only thing easier than cleaning with these magic sponges would be to
tell the little bastard not to stand on the furniture with his muddy cleats while wiping his grubby hands on the wall.