I tried it on my old one. I didn't use a lot of pressure meaning I never used the trigger when I rinse it down. I only covered up the battery with a towel and left the engine running while hot.
Didn't you get a lot of water spots? Usually if you spray water on it while hot, the water will evaporate very quickly and leave lots of water spots behind. Also, I have been told by mechanics to never spray water into an alternator while the engine is running.
Former owner of a 2003 Vibe GT---Great car that gave me 8 years and 83,000 miles of trouble-free service.Current owner of a 2008 Hyundai Santa Fe Limited AWD.