Is there a problem of being molid reyach (causing a fragrance) in the water? I was told that it's forbidden to use Poo Pourri or Just A Drop because it makes the water have a fragrance? What about the tap water that now has the scent of the soap? At least this sounds like a psik reisha?
B¨SD Hello, it would be forbidden to use scented soap if you wanted to get the scent from the soap, and therefore it should not be used at all because it is very hard to be certain that one does not want the smell at all. However if someone is doing it purely for cleanliness purposes and has no intent at all to get the scent it would seem to be okay.
Sources: Shabbos Kehalacha Vol. 3 18:4 footnote 13 Taz 511:8
- Also see https://shulchanaruchharav.com/may-one-wash-his-hands-with-liquid-soap-on-shabbos/#_ftn13 for more info and where this info came from