Spit always worked in our masks for scuba diving!
I don't really like the idea, but it certainly works.
I'd like to know if the above mentioned RayZor stuff works.
I bought a pair of these off Ebay and although they are comfy, but, they steam up in seconds and are rubbish at clearing.
Only £12, but not much use.
I bought Sundown goggles from Tiso (not expensive) and they are brilliant.
Never fog up and really help keep elements at bay.
Good luck.
Chris