If you can see a gap on the outside of the frame, a temporary fix that is easier than caulk is Capt. Tolley's Creeping Crack Cure from Amazon or WM. It is a very thin sealant that fixes the leak by filling the gap over a few fast drying applications. You keep applying it until it stops going in. I have used it for years on all sorts of boat cracks including leaks where the lexan meets the metal on a hatch.

