Replying to New Oakley Line Miner fog problem

I've had a pair of line miners or about 3 weeks, and last weekend they've started to fog whenever I stop moving. It's been quite warm, between +2 and -2, the fog disappears once I start moving again. I have 2 lenses Hi-Pink Prizms and Jade Iridium Prizms, the fog problem happens to both lenses. I'm unsure of whether this is just because of the heat or some other problem. Does anyone have some advice on how to fix this problem?