Solution against cleaning scratches

Hello,

Do you guys know which is the best solution to avoid scratcing the original paint caused by the guys cleaning cars at parkings? I know this is the worst you can do, but it's so convenient so Im not going every week to clean it somewhere.

The thing is, I had always cars with wrapping and wasnt that painful, but now I have a new car with original paint that I don't want to scratch... so, do you guys think is PPF worth it? I heard also about the nano ceramic treatment, is it worth it? what's the best solution?

There's algo I can give or tell to the parking guy at my building to avoid scrathing me car every single time he is "cleaning" it?

thanks folks