Water leak in Hatch

[jra]

My 15 hatch hasn't leaked yet, knock on wood. But my 03 Echo sedan always leaked around the tail lights. I put new weatherstrip on them, then tried thicker weatherstrip, then caulked around the weatherstrip and put a bead on top where tail light makes contact, almost stopped, but it still leaked a little. Bad design, you would think as many years as Toyota has built Echos and now Yaris, they would have come up with something that didn't leak.