He doesn't necessarily sound unclean to me.
But the thing is, it doesn't really matter whats acceptable to us. What matters is that you can't live with it.
I do think it sounds like it's largely your ocd speaking.
If I'm honest though, I would probably look to end this relationship. Or at least, take a break where you live elsewhere.
He's not doing anything wrong but...I don't see how your mental healtcnaan improve I you are around around your main trigger 24/7.
It's also not fair on him. I don't think it'll do his self esteem any favours to have his partner view him as gross, do you?
Could one of you live elsewhere for a while and see if that helps things? If he's willing to do that for you.
I personally got over the germphobia aspect of my ocd in part, via exposure therapy. For example, refusing to wash my hands even when I really wanted to. Until the urge to do so past. Or, setting a timer for 10 minutes and doing something else to take my mind of it until then.
But I had to do this in a less stressful time of my life. I couldn't have done it if I was constantly around the cause of my stress. I did have to push myself and it is wasn't fun...but I felt in a healthy place energy wise...as I'd left school and my life was calmer than it had been in a while.