condensation in headlights

I have a 93 SC 300 and have a problem with the headlights fogging up because of condensation. It happens almost every time I wash the car and takes anywhere from a week to 2 weeks to clear. It only occurs in one of the headlight assemblies. Is there some way of correcting this problem? I haven't taken the headlamp assembly out of the car to look at it yet. Is there a drain hole in the assembly that might be plugged up or is a leaky seal? Any help would be appreciated.

Thanks

Mike

You will need to removed the aseembly,
take it apart;
(you can put it in the over at 250 degrees for 15mins, to help soften up the sealent)
then you will have to srape out the old sealeant.
clean the assmebly
and then reseal.


The problem now is that there is a leak in the sealent soemwhere.
there is a drain hole in the back, but the cuase is still the bad seal.
Almost every sc300/400 has this problem

This is the exact same problem with mine but i have no idea on how to disassemble the unit...i figure the dealer will just replace the piece...i wonder what the cost might be...