As painstaking as this is gonna sound, I guess you don't have much choice other than to buy new lamps.
Get someone to remove the lamps, remove the bulb (some Wira's came with the stupid security lock thing that makes it almost impossible for the average joe to open), drain the water, dry the lamps out. Check the opening where the bulb goes in, is the rubber seating and sealing the hole properly? If not change it, if there's even a tear in it.
Make sure you dry the whole lamp thoroughly first if not it'll just defeat the purpose of this.
After this to make sure this problem doesn't continue, apply silicon sealant to the edges where the glass meets the body of the lamp. Make sure its heat resistant sealant or else it'll just melt over time.
Hope this helps!