IZ Einszett kristall klar washer fluid concentrate

I love 1Z Wash Fluid Concentrate. I always have a gallon mixed up. Cleans well, no streaks, etc. I think I got a sample of it at SEMA one year.
 

This is what I am using as well.


Honestly I use it for winter as well. But I have been cheating a little. I have picked up the "purple" winter washer fluid off season for $1 gallon. So I bought a few gallons. I then add 1Z Wash Fluid Concentrate as a booster. It works grew for me. I am looking for a few extra gallons of winter washer fluid now for next year.

 
How do you guys think 1Z compares to P21S Windshield Wash Booster?

I love P21S cleaning ability in the warmer weather but stopped adding it during the winter after noticing it freezing.
 
I also have the 1z concentrate. I liked the Anti-Frost better. I get drying streaks for some reason.
 
WOW! They put some thought in this one. Amazing cleaning ability. Made short work of bug guts on the way to work. I have used the pinnacle additive. Sorry. This wins, hands down. I would order again in a heart beat......
 
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