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Prestone concentrate screen wash dilution

9.5K views 33 replies 10 participants last post by  ReeceD73  
I've used Preston in the past currently using Infinity Wax but use the same dilution.

I have a couple of old 5l containers with the pourer can't remember if they're Prestone but think they are.

In the winter I fill them half water half screenwash. So I've always got at least 10l of screenwash.

In the summer I actually dont use my washers much so tend to dilute it 2 parts water to 1 part screenwash which tends to get rid of bugs 👍🏼