Maxsam said:A quick google found this http://www.wikihow.com/Keep-Car-Windows-Fog-Free-Using-a-Potato
Brilliant. I especially like:
"This method can also be used to keep ski goggles from fogging up. Rub raw potato over the goggles when changing into your ski gear. Sure, you'll need to remember to cut a potato in half and pop it into a plastic bag before going to the ski field, but the clear vision will make it a worthwhile effort."
Hmm will try that in March when I next go skiing. Will look like a right wally