FTO AUSTRALIA

Ok so today while I was out driving super fast in the rain, my drivers side headlight developed a bunch of condensation on the lens. Theres no visible water inside the unit, so I was wondering if its more likely moisture from the air getting in then a leak. I don't really want to bake and reseal the thing. Has any one else had this problem?

Seen it on a few, I just remove the High beam bulb for a couple of hours and it usually leaves.
Not sure about stopping it occurring though..

Yeah that's what I did as well, except I stuck a funnel through the hole and blew hot air in with a hair dryer.