I was printing at 185 for the first layer, dropping to 180 after that.

I think you're right about the nozzle being dirty, for a couple of reasons. First, I didn't have this issue the first few prints I did, and second, it appears to be clogged now. I'm working on unclogging it at the moment, but it was curling the filament as it exited the nozzle, and getting all over the hot end.