Sweat condensation

I've heard some users mention wrapping a bandana around their foreheads to wick away some of the sweat.

A slightly more awkward solution that I enjoyed but might not serve you well in active games, is to use a halo strap like Bobo M2 and outright remove the facial interface like a budget Quest Pro. Maybe I'm just out of my mind, but I thought it worked well enough and I love the open air on my face in VR.

I got this thing that blows in air from the top. Totally fixed the sweating and fogging problems. Works pretty well even without the fan part attached just having an opening there. looking at Amazon, I think it was Hibloks.

I haven't tried them yet, but these sweatbands look like they would work. They look a little ridiculous, but who doesn't look a little odd in a VR headset.

YMMV, but I use a VR Cover fitness interface since day one and haven't had any problems with fogging and sweat. The face pads for these are velcro and easy to remove and clean too.

I have the Fitness Facial Interface from VRCover and I never had a fogging issue. I remember having that before occasionally, not sure if it’s entirety due to the facial interface but it seems to work for me