Confinement Woes

Hi mummy, as Chinese tradition we can't use tap water to shower for some Chinese confinement practise. I use with tap water in my first pregnancy to brush my teeth and wash my face and end up having arthritis only on my fingers. May i know how do u wash your hands after goin to the toilet? Using plain tap water? Sanitise your hand instead of washing? Prepare a boiled warm water flask in toilet just for washing hands?