Florida summers: 90 degree heat and 60%+ relative humidity. I'm finding myself stopping in the middle of my rides to wipe away the sweat with a rag every 3 miles or so, and by the time I've gone 20 miles the skin around my eyes feel like it's been rubbed raw.

I know I'm not the only one being blinded by perspiration, so if anyone has some good techniques for beating the heat I'm all ears.