Have the same situation with my '98 GS400. HID Right side. Same response from local Dealer. $$$$$. (see my post under GS400.) Another club member recommended the blow dryer too, but I haven't tried it yet. Not sure of what the long term effect will be if I just leave it since the center of the light is clear and night lighting seems to be appropriate. Curious what you do?
Well here is what I did, I was able to remove the turning signal light and then put the air hose from my compressor. After about an hour the light was dry!
We will see what happens now, it has rained several time now and the light is still dry. Thanks for your input.