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Q. May I use hand sanitizer on Shabbos and Yom To?
A. Rav Schwartz ZT"L said that using a hand sanitizer such as Purell on Shabbos and Yom Tov is no different than using liquid soap; Iggeros Moshe (OC 1:113) holds that this is not permissible, but many Poskim are of the opinion that it is permitted. Rav Schwartz ZT"L accepts this latter approach.