I used this for the first time , a couple of months ago . Best stuff I have ever used . get to around 40 - 50 MPH , front screens clears its self . Problem I got is the rest of the family is trying to get their hands on my bottles to clean their cars .
It's easy saying get to 40-50, but when you cant see its impossible. Busy non-main roads where your stopping and starting, stopping at traffic lights, going past school runs, in and out short roads is when you cant go 40-50. How do you clear the window when its raining ? It just beads.
If you go over 40-50 fine, for anything else, its useless and by that time you've crashed, caused an accident or been pulled by the police cause you aint cleared your window.