I was having ongoing nozzle clogging, and here's how I solved the problem, and aimed the nozzles too. First, I disconnected the fluid lines under the hood where they enter the nozzles. I opened up the fluid filler cap, stuck the garden hose into the reservoir and turned on the hose. Then, I turned the ingnition to accsesory and pumped alot of water through the tank and lines until the tank was flushed clean, clean, clean. After reattaching everything, I used a common household staple, straightened out to clean out the nozzles themselves. I also used this to aim them. Afet reattaching the lines from under the hood, everything ahs been just fine since. No clogs, proper aiming and blur free driving.
Hope this helps.

MP
87 760 Ti wagon 212k miles