Bought these lights a few weeks ago and haven't had a problem until last night I walk up on my truck and see this:



What should I do? Do I need to go get some sealant or what?

 

No, thats perfectly normal. The headlights atmosphere will slowly vent to equillibrium with the one-way vents on the back of the housings. Unless you've got large droplets of water, everything is fine. Mine took a couple weeks before they vent out. If the weather changes drastically, it will revent until its totally dry.

 

Give them some time and it should go away....