When the temp is close to or below freezing, I just wash the bike in the basement (with bucket, brush and warm soapy water). Can mop up the excess water later on. Or if you don't have a basement or live in an apartment, then use the tub and/or shower. But this should only be needed in a decent size snow storm or you went through a lot of salt. Otherwise a short wipedown on the chain and bike and relube is usually ok.