[Kali_Namir]

My uncle didn't either at first. He would just not allow anyone in the house or anything like that. The main way he realized he had a problem was that he sunk into depression from getting laid off, and then ended up watching the show Hoarders, but I think the kicker was he had to go for a physical for his new job and I think he was informed of how unhealthy he was and it made him give my mom a chance.

Try having him see the show, that might help him recognize he's got a problem. Is he at all interested in monetary gain? Because that might make it easier to help him let go.

If anything, offer to help him Organize it better. Like put the things on shelves or in bins, anything to help make it safer and cleaner. That might help a little...