Is there anything I can do to a new set of headlights to keep them from fogging up on the outside? I don't want to buy some just for them to look the same as the old ones in a few months.

 

Yea don't use windex or any cleaner that has ammonia in it to clean the headlights, or anything plastic. And ESPECIALLY never use an ammonia based cleaner to clean tinted windows[:@]

 

Yeah but is there anything like a clear plastic strip or anything I could put on them?

 

simply wet sand (depending how bad there are) and buff with its either Mothers or meguiars Plast X.Then you could probably clear them.But the plast x works awsome. ive done my headlights a few times with it now.

 

Just spread some additional silicone around the outside of the lights where the lense meets the housing. That should prevent any moisture from building up inside.