Washing Cars Inside of Your Garage
When I lived in Apple Valley, California back when I was working for Meguiar's and before coming to work for Autogeek, it was difficult to wash your car anytime other than early morning due to the heat, sun and wind. Apple Valley is in the high California Desert, part of the Mojave Desert so it's always windy and VERY dusty.
Temperatures in the summer were always hot throughout the day and the night
and the coolest part of the day would always be early morning.
This made washing a car difficult, especially if the car was dark in color.
I washed cars in my garage.
I had purchased a EZ-Up Canopy that came with 3 side wall curtains for mobile detailing and when I would take these plastic curtains and attach them to the sides of the walls to keep water from getting on all the stuff stored in your typical garage.
Worked for me...
If water pools on the floor instead of running outside then you can use a broom or get a floor squeegee
and squeegee out the water after your final rinse, anything left will evaporate fast enough...