"You're not supposed to put sunscreen on your forehead when doing physical activities."
That's the weird thing. I only put the sunscreen on my cheeks and nose (below the bridge), not on my forehead or anywhere closer to my eyes. I wear a bandanna pulled down over my forehead so I don't need sunscreen there. Best I can figure, the breeze blew the sweat up from my face into my eyes.
I'll try some different sunscreen.