I'm having the exact same problem with my 2017 Sedona. Just changed the second bulb in less than 4 months and there was about a cup of water that I had to drain out first. I guess I'll try to address where it's leaking in from, but for now I'll do this and give the water a way out. Appreciate ya bud!
I'm having the same issue with my taillights. I removed and tried sealing the seams - no good. Have you had any issues with the hole that you drilled into the fixture?
Watch this video to get the tail light off. I’m trying to remove the plastic housing to wipe the light down. I removed all visible screws from the housing, but it doesn’t separate ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SVesxf3SyaQ.html I did manage to get the everything out. I guess what you’re doing is good to drain the water as another fix. Hopefully it’s working for you. Light bulbs are $$$$
The hole allows the water to drain on its own as it accumulates so you don’t have to do that all the time. I did the same thing, but I’m just gonna drill it to avoid having to buy two 150 dollar tail light replacements that will probably do the same thing.