Hands Up–Wiper Signs
Hands Up- Wiper Language
The car wash boy raises the wipers of cars he has already done to tell the sleeping owners that he has done his work. It is a form of attendance marker. If he leaves one wiper up it means he has wiped the car with a wet clean cloth but not washed the body and tyres.
Sunday morning all the wipers are up for a long time as people sleep late.
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