It does a very good job after a night trip, the car was in a terrible condition from mosquitoes and flies. The next day, I sprayed it, left it for a while, and with the hose without using a pressure washer, 90% of it was gone, the remaining 10% disappeared with a light scrub. I don't know if the flies will stay on the car for a long time if it will be able to do the same job so easily.

It does its job, but don't expect that you sprayed and finished. Personally, I had to go over it twice and it required a lot of scrubbing to clean the area completely. However, the result is that the job was done.