Our 2006 Patriot had water and dust collecting in the tail lights. I removed the tail light assembly and found it was getting in around the lens. One of them had a half a cup of water. The lens are held in place with an elastic adhedsive. I removed the back up light lens, cleaned the reflector and lens, then replaced it with silicon seal. There is a heavy foil on the top and bottom of the lens that interfers with the lens mounting. I used silicon caulk where I could on the others that were leaking..