My windows are tinted so I use Dawn (or another type of dishwashing gel) and paper towels for the inside.
I wet a few towels, while one is wet with soap. Wipe the soap on in a back and forth motion until you feel it is clean.
Use multiple wet paper towels to wipe off soap from inside window. Switch wet towels often, until soap is clearly gone from the surface.
As soon as you finish with the last wet towel, dry with a dry paper towel.
MAKE SURE THAT YOU DO NOT APPLY TOO MUCH PRESSURE THROUGHOUT THE WHOLE PROCEDURE
- Streak free