Nope.... mines fine....
When you did your HID conversion did you muck up the rubber boots that seal the rear??? Only way that could happen...
Id pull the lamps, get the bike in the sun, and dry the shells out with a hairdryer completely, and install the lamps and boots paying close attention to getting them sealed...
The shiney coating on the reflectors can and does succumb to corrosion after a time, if not sealed...