I've been trying to go to sauna on a semiregular basis now that there's one in my building, and I think it helps clogged pores by getting rid of dead skin. It also really improves circulation, so It's a bit like exercise in that sense. I don't know if it's good for pimples though, since heat might aggravate inflammation.
I've been trying to go 1-2 times a week for about 15-20 minutes at a time, but unfortunately I don't usually manage quite that often. My clogged pores are better these days, but there are other important factors that may have played a part.
Last summer I tried BHA creams and differin, but they seemed to make everything just worse. Frequent gentle washing and sauna seems to suit me much better for exfoliation.
Just curious - how does a sauna help exfoliate / get rid of dead skin? I'm guessing you still need to use a physical exfoliator of some sort?
I usually wash and rub my face a little afterwards but I don't use anything else. I think the exfoliation is mostly caused by the sweating and moisture (a bit like steaming), perhaps also the increased circulation. It's nothing excessive but definitely noticeable, especially if you haven't exfoliated or been to a sauna in a while (this goes for all skin, not just face). I haven't used physical exfoliators for years since I found them too harsh on my skin, but using one after a sauna would probably be a great idea.