Ahh, let's not start the whole 'water injection/sprayer' thread again please.

Flix this has been discussed many, many times. Try searching here and dsm.org under "water injection","IC sprayer", etc. Oh, and BTW - the consensus is that washer nozzles are not up to the task for that purpose.
I find the 2G back sprayers are pretty good. My friend put a pen-tip into the nozzle to re-aim it to spray directly at cars who follow too close behind!! Works great!!