Ha. What did you do to it?
I tried some of the stuff suggested here, dish soap, lens cleaner and neither of those really helped so I went googling and tried a bunch of stupid shit from yahoo answers and some ski forum, which made it much worse.
1 day? use sunglasses.
I'm planning to do some night riding so sunglasses probably won't work well for that. I'm not too concerned about it really, i can survive 1 night without anything. hopefully its not too cold & windy.
but i guess i'll try taking out the inner lense as a last ditch effort. its just there for antifog which is ruined anyways