system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Touchless car washes that spray liquid after liquid to "presoak", "power wash", "sealant", "protective coating" and other things, how does this work? Does spraying X liquid after Y liquid after Z liquid really clean and do anything to protect a car's paint?

Edit: as in no need to really dry/wipe off the prior application?  Or is it really just a soap and wash that gets most of dirt off?
gpt
X liquid gets things loose so Y liquid can spread it apart when scrubbed. Then your car is clean. Then they spray on Z liquid which acts like plastic wrap. Sticks to the car but let’s other things slide off.