They need a bath with shampoo every week, and need their ears, paws, eyes, and skin folds cleaned every other day or so. They're also chilly, so they need clothes, but if you don't manage the clothes well they'll get acne. He's a huge sweetheart and rides around on my shoulder. I'm making bread right now with him perched there.

AFAIK the big one is that their skin can get oily and needs to be gently washed with an appropriate soap once a week or so. My buddy who had one used a single drop of dish soap. They can also get chilly in winter if it's a cold climate, so little cat sweaters can help.

I know they need help cleaning themselves, dirt and litter and whatnot can build up around their toes and claws and their ears get dirty.