I spot clean w/brush cleaner as I go and then wash everything used on weekends with Dr. Bronner's.
Plain Castile soap? Available at CVS. Dr. Bronner's too I think
IME a long time ago when I was really trying to go cheap all-natural, yes it was - r/o
I was curious about Dr. Bronner's, it says a couple drops used for facial cleansing. Is this too +