Wash the windows with car soap and water
Dry the glass with a clean microfiber towel
Apply white vinegar to a microfiber cloth
Wipe the water spots with the vinegar-soaked cloth
Let the vinegar sit for a minute if needed
Rinse the glass with clean water
Dry the window completely
Use a glass cleaner for any remaining residue
Apply a dedicated glass polish for stubborn spots
Use a clay bar on the glass if deposits remain
Repeat the process if necessary
Finish with a clean, dry microfiber towel