1,the most important. You should pay attention to that brush. Someone put it on the ground, and if the ground is not clean, sand will stick to the brush, and my car paint and glass have be scratched. 2, I don't deny that this is a relatively good place, but some bay parts are missing and incomplete. You need to pay attention when you go there. 3，If you have high requirements for cleaning, you can either bring a professional cleaner yourself or go to the car wash. The cleaner here is just a simple cleaning. I foamed twice and still can't dissolve the dirt on the car paint. final,The normal ten-minute external cleaning is actually not cheap, and the effect is not as good as the cleaning effect of the car washing machine.but better than the rain wash:)