I had water in mine last year and read a post saying they were screwed down to tight, i thought yeah right, but after taking them off and draining them it made sense. If they are sinched down to much the drain holes get covered up. Had the same problem with the taillights as you too. ..... dealership took off the lenses and reseated the gasket. .... been a year and hasn't happened again.
Jeep #3.. 2012 JKU Sahara, Deep Cherry Crystal Red with body color top and fenders, automatic, 3.21's with limited slip.
2010 Mustang Gt 5spd, 3.73's, SLP loudmouth axle back,Roush CAI, factory 19's,leather and glass roof.