I don't find that my Rift lenses fog up, just mainly my glasses. I bought an antifogging agent from Amazon quite a while ago, Quick Spit, and it works pretty well. Actually, a little natural spit on my glasses lens seems to work pretty well too, lol! Apply either and gently wipe off with a microfibre cloth.
thks ya same prob.....il try it
also the gear was just pressing back on my glasses too hard