I had problems with condensation in my tails till I installed new gaskets. They are thicker and have adhesive on one side. I've had ZERO problems since I installed them last December.
I usually DIY stuff like this, but at $12.50 each I felt like they were a good purchase.
https://www.ebay.com/itm/2013-2016-S...A0dm:rk:1:pf:0