Fog Light Switch problems of the 2011 Cadillac SRX

The headlights are both full of moisture and they keep shorting out and don't work allo the time. I called cadillazc dealer and they want $4500. 00 to replace them. I can n ot get after market headlights. They have motors in them which move when car turns. I heard that there is a defect in in them an d gm has not said anything about it . Not sure if this is gtrue or not but I can't see the price to replace them and im disabled ,retirfed and soun ds like the price is out of this world and feel like they are price gouging!!!! took them apart an d dried them out but moisture came right back in both headlights again. Can not see any defects in lights but moisture is still getting in and causing lights not to work. Been driving around with fog lights but I no this is not safe and something is wrong for both lights to fill up with moisture. Cadillac dealer (hill Cadillac in newtown square PA said they are not covered under extended warranty and car only has 50,000 plus miles on it and headlights fill up with moisture and short out. The price to replace them is outragious and heard that still might not correct it????.