Assalaamu alaikum Moshy,
(smile) I'm not sure of the point of view of the necessity to wash everything for purposes of worship… but I sure think that for reasons of general hygiene and peace of mind, that washing everything is best! (twinkle) I must say that when I read your postings, my immediate reaction was: ewwww!!!
(twinkle) And welcome to the Forum. I don't recall welcoming you before.
May Allah, the Gentle, Bless you and make your time on this Forum beneficial for you… and for those who may read you.