I recommend you use a car wash detergent made especially for car finishes, that you can buy almost anywhere. Do not use any detergent that removes grease or it will remove your wax.
Smart wash
should you polish your car after washing it
A 6 minute car wash and rinse will use up to 60 gallons of water, you should try steam cleaning its much more water efficient.
It is advisable to wash your car at least twice a month. I pressure wash not only the body of my car but also the undercarriage, to avoid it from rusting. I use an undercarriage cleaner from best car gurus, makes it super easy to pressure wash my car's undercarriage without having to crouch down or lift my car
On the car wash bottle it says not to. I'm trying to find out why not to
It is not recommended for a laser wash. But a regular car wash that doesnt have alot of pressure behind it should work.
There are many ways one might go about washing a car by hand. The best suggested way is to use a very soft rag, such as a microfiber cloth, to wash and dry the car to avoid scratching.
A good car wash soap, it doesn't leave spots, dish soap will.
a commercial car wash averages less than 45 gallons ...
Yes
You risk damage to the car's paint.
Self-service car washes can differ from one location to another. One should be able to find instruction at the self-service car wash facility. They are usually located on the wall by the change machine and inside the carport where you pull your vehicle into to wash.