For context, with Autofoam I need approx 500ml of it in a lance to get the recommended 4% PIR. This would be a fair bit more than an inch, so it may be that it’s too diluted.
Furthermore, Touchless is MUCH better at removing traffic film and general winter dirt in my experience. It is also more concentrated, so you need 2% instead of 4%.
Same, my snow foam lance bottle is usually 1/4 to a 1/3 of snow foam with my setup/foam setting.


