A weekly cleaning is important for the longevity of make-up brushes, but washing them is a chore. Enter Bill Crosby, maker of Brush Off, a product so hot that major cosmetics companies have been faxing him for information about it. Crosby got the idea for Brush Off (a make-up brush cleaning solution in a pump spray bottle) after learning that women don't clean their brushes-they just buy new ones. Designed for natural bristles, Brush Off contains mild solvents to remove oil and pigments found in make-up. It's squirted directly onto the bristles and then brushed off with a tissue.