The CDC and other health officials have released information on how to correctly wash your hands, and that it needs to be done often. While washing your hands is the best defense against the coronavirus, sanitizing your phone is a must as well. A cellphone can carry a virus on it for up to nine days, even if you’re keeping your hands clean. Officials are recommending the use of an alcohol wipe or microfiber cloth and disinfectant to clean your phone, both the screen and the back. Günter Kampf, M.D., a researcher studying the coronavirus, recommends disinfecting your phone each time after you go out in public.