The best way to deal with this, hands down here on the Wet Coast (West of the coastal mountains) is with fans period. You can have the latest Hi-tech formula on the lens that will not allow the moisture to stick to your lens it will still be in the mask splashing back up on the lens as you move about. It drops back to the bottom of the mask distorting your vision ever so slightly. so if you can't evac or push the moisture away from the lens, you are in the some leaky boat.

I have seen some guys cut there goggle masks open more than the factory spec. hoping to help vent the moisture away.
If the opening is larger than 5mm that mask is now not aloud on the field. Besides you are asking for trouble EYEBALLS don't grow back. As a FM I have asked guys to get a different set of goggles to play with if they were planning on playing that day (I lent them a pair). If you are a slow moving type player that dosn't dress like you are heading for the North Pole then a pair of Double lens goggles will most likely work for you, as long as you have good allowable ventalation you will be good to Go.
If anyone is running with the ESS, Revision, Smith Optical (OTW) or any of the low-profile blalistic goggles in the same classification I have fans kit that will fit and fix this situation as well as regular kits for paintball goggles too.. If you are running Sealed shooting glasses Dice has a sweet little set up you will want to check it out it works well.