I am getting back into doing my own Car detailing. Been watching many different videos in regrades to your water, and water spots. I keep hearing to add a drying agent to city water to break the surface tension of the water. Ok, how is the easiest way to do that for a DIY use? Is there anything in the agent I need to look for?

Also on a side note, I just seen a video that said to use a spray wax as a drying agent. Does this work, or are they doing a quick sell?

Thanks for any help.

My Detailing process

-rims and tires
-wheel wells
-soap and rinse tires, rims and wells
-bug removal
-water rinse car
-pre soap soak
-full rinse
-hand wash top to bottom
-rinse
-hand dry
-wax and seal when needed
-door jabs clean and power wash and seal
-interior cleaning - carpets, dash, plastics, seats
-glass - inside
-wax/seal as needed
-windows outside
-rims and tires
-chrome
-all black polished and treated