I'm sure every one but me knows this from experience but here is a reminder. When you apply sunscreen, keep it away from the bridge of your nose and around your eyes.
This goop does protect you from sun but it also causes pronounced eye blinking and squinting. You ride feeling exactly like you feel when tired although you got plenty of sleep last night before the ride.
Apply your pf 30 an hour or two before the ride and let it wear in a little. Imagine a raccoon and do not apply excess (or any) sunscreen in the mask area. Cheers, stay up and watch those intersections!