water logged lights

Okay, so I am going to ask something to make me look really dumb, but....My stock tail lights have some serious condensation in them, and I don't know what to do. I had LED tail lights and it burnt them out. HELP. Is this a common problem?

that just means that there is a bad seal somewhere, take the lights off of the car, heat them up with either a heat gun, or put them in the oven, and get them warm so that u can pry apart the plastic pieces, then clean out the inside if it is dirty, then put the pieces back together, and here is the real trick get some clear silicon sealent and seal the edges real good, make sure to get all the way around, then install back on car, the hole wherever the water was getting in should be gone

same goes for the headlights.