if you did a full HID conversion (like retrofit) theres a chance that your headlight housing didnt seal 100%, which is gonna be awright for the most part. if you use a high-pressured hose or even a normal one while pointing it around the edges of your headlight for a long time, theres a chance that some of that water can be forced inside. and then add your crazy high temps, and you'll see a bit of condensation.

the condensation should go away in a few mins after you wash. my advice would be to take it easy when pointing your hose at your lights. ive got retrofits and its happened to me before, but it only happened once. even in heavy rain, it hasnt come up. so you'll be awright.