The problem is generally the chrome cap on the windshield. The water is coming in between it and the top of the windshield. I ran a small bead of sealant (after I got tired of running a strip of duct tape) along that joint and it helped alot. Part of the problem are the holes in the top piece for both the latches and the bolts for the hardtop. When the pressure is great enough (ie. rain being driven into the seal because of forward car speed and wind effects) water will seep in to those holes and drip on you from there, too.