You can probably push the gasket in place, but that is most likely not the problem.
The problem is that the original OEM headlight vents ALLOW condensation to build, you need to install the upgrade kit available from dealers.
To fix the already present condensation, you have to remove the headlight units and follow the advise here :
https://www.crossfireforum.org/forum...tml#post659138

Headlight seal & cap kit, #05174786AA