Yes, I tip car wash workers especially with this heat. $3-$5.
Top anywhere from 2 to 5 dollars depending on how well and how much time they spend on my car
I leave a tip every now and then when I feel it's needed. The most I ever left was 2.50
It's like tipping a waiter, for the service they give. I tip $2 most of the time and $3 to $4 if they did extra work like removing bugs from the front bumper.
Thanks! Your answer is awaiting moderation.