Excellent product for me. I use it with a foam sprayer before I start washing or anything. Directly on a dry car and then just after about five minutes when I rinse it off, it's perfect for the regular wash. It removes quite a bit of dirt and leaves the light film you need for the sponge. Generally, the packaging with the 5 liters is quite economical. Because in terms of solubility, it requires very little. It doesn't foam richly or anything, but that's not really its job. It also helps quite a bit with cleaning the wheels.

After using autoglym polar blast pre-wash soaps (neutral ph if I remember correctly) and feral (alkaline), I tried this product. Initially hesitant because of its ph, but very satisfied! Initially for wheel rims and tires, after applying K2 roton pro, spraying with Vb hand foam gun. It removes dirt easily, a little scrubbing with a brush and rinsing! It leaves the body almost clean without contact and remains hydrophobic due to wax application and after 5-6 washes. In the end, apply a quick wax product or the recommended koch chemie PW!!

P.S. Bugs and other insects stuck on the bumper... nothing remains!