So my niece lives with me; she was not used to showering more than once a week. Yea... she stank and I refuse to share space with nasty BO. So I started making her shower at least every other day. It's taken over 6 months but she finally knows which days she needs to shower without me having to remind her. The first 5 months were hell though. I do suspect she has ADHD.

If only I could get her older brother to do the same. He shares a room with his father who barely showers as well, so I think that's a battle I'd lose unfortunately. And yes, they stink. Horribly. But at least I've saved my niece from being bullied (which happened in the past before they lived with me).