I went to the dealer and the service manager said that thats normal, because the light is hot and outside temperature is cold, so there is condensation.

So there is nothing we can do to fix it

 

anyway the service manager said something like this too..

"another reason why there is condensation is because the cars were manufactured in a place where there is a high humidity"

hope this helps ^^

 

porsche won't admit that it's ​a problem as such, even though it occurs in almost all of their models including the Carrera and turbo, and even the GT3
Only model not effected is the half million dollar Carrera GT, which porsche claims is totally sealed and never gets condensation!
They used to have dessicant bags for this problem, but are no longer available.
I use a hair dryer and removed the back covers and the breather plug on the bottom. After all the condensation is gone, I just put a handful of small dessicant bags (from Amazon) inside the housing!
By the way, my left side assembly had so much condensation it looks like a shower door after a long hot shower...literally covered with large water droplets! Probably had 1/4 cup of water!