Give him food and water. I guess I can try trim his beard with scissors if he wants. And I would try to facilitate the bath. I know people don’t want to let random homeless people into their houses because they’re worried about theft, but it is so hard to get a shower or bath if you’re street homeless, and besides, if he steals something from me, clearly he needs it a lot more than me. I don’t have anything too valuable in my bathroom anyway so if he wants to nick some toothpaste let him.