On its own, such a spray does not do everything, you have to use a long brush afterwards to dissolve the dirt. The company itself then suggests a pressure washer, if you don't have one, spray it with a sprayer and then clean wherever you can reach with a cloth. While it had residue inside, it broke the plastic button, you press it and it releases liquid from the nozzle but also from the cap, I will not buy it again for this reason.

I bought 2 sprays to clean 2 engines which had nothing but a little oil in the bottle for the steering wheel due to oil leaks. And dust. I sprayed it, let it work, and after 15 minutes everything was the same as before, neither the dirt went away nor the plastics had the appearance of being so new. It was just a waste once it dried up