Habit Versus Habit: Using Chewing Gum to Remove Coffee Stains

A straightforward attempt to use one habit—chewing gum—to undo the unwelcome effects of a different habit—drinking coffee: “Whitening Efficacy of Chewing Gum Containing Sodium Metaphosphate on Coffee Stain: Placebo-controlled, Double-blind In Situ Examination,” S. Makino, C. Kawamoto, T. Ikeda, T. Doi, A. Narise, T Tanaka, C. Almas, M. Hannig, R. Carvalho, and H. Sano, Operative […]