Fog tech is the best thing I have found short of installing a fan. If you dont have or cant find fog tech then dish soap works very well.
One of the guys on my team had a very small wipe on both sides of the lens wraped around a small magnet when he moves the outside one the inside one would clean the lens. But that is only if you dont mind having a small wipe in your goggle.
Play with Honor. Call your hits.
Nothing just happens, You always have to strive...