Any tricks to defrosting a full-faced visor while out on the trail? I was riding the Denali Hwy this weekend, and my visor frosted up (on the inside). I discovered (the hard way) that putting the visor in line with a running machine exhaust temporarily defrosts it, only to have it frost on both sides about 5 seconds later! True, it was quite cold (like -20F) that day.
Can anyone suggest a functional way to address this while out in the field? Thanks.