Well you need to figure out first where the water is getting in.If it was me, I would
try took check all the window rubber seals first.If I could not find the cause,I
might considered drilling more holes for the water to drain out.Maybe do a web search
as possibly someone has had this same problem.Good luck!!
An update: I lowered the top and found 1/2 inch of water in there took my Rigid Wet/Dry and sucked out along with acorns, and pine needles galore. When I finally got the holes free, I tested it out by running water along the side all drains are working and panel isnt filling up with water.