That don't make any sense
Don't forget you need to run it through all the pipework and jets after filling the bottle and if you used the stuff I recommended then you'll know it's working because of the smell and froth on the windscreen.
All the same it's a good idea to clean your wiper blades if already caked in ice BEFORE you start your journey.
I did run it through, well I must have cause I was using it yesterday but it wasnt that cold so it must be in the pipework. This morning it worked fine when I got to the car because I park under shelter so it wont be that cold.
Got out onto the roads and it wouldn't come through the jets anymore. So annoying. :bang: