My roommate only washes up if he poops, never after peeing. Now every time I’m in any of the common areas I have to wash my hands after touching anything I haven’t wiped down. Thus, I wash my hands twice every time I use the bathroom; once as normal and again in the kitchen because I touched the taps, light switch and door handle in the bathroom which likely have groin sweat on them… /rant
Keep the earlier phases hidden somewhere private and then start from phase 3. Everyone who cleans their hands will be fine. Never end the phase until behaviour improves and keep a healthy supply of hand sanitiser in your room.
Ooh, a blind experiment. I like it.