Use a Mitt:
If you’ve messed up your application and need to remove it quickly, the easiest, fastest method is to slough it off with a specialty mitt. (Insert tan “Mitt” Romney joke here.)
Jennifer Savine, expert tanner with Vani-T, likes the Tan Eraser Sunless Tan Removal Mitt. “The viscose mitt is double-sided for easy access to hard-to-reach places,” she explained. Soften the skin in the shower or bath first and dampen the mitt, squeezing out excess water. Turn off the water and, using reasonable pressure, rub the skin in a rapid vertical direction. “You will see folds of dead skin (and fake tan) roll away,” Savine said. Yuck, but also–yay!