What is the best way to clean the inside of the windshield of an Audi A1?

I have noticed there is a lot of dirt and streaks on the inside of my Audi A1's windshield. What is the most effective way to clean it without leaving any smudges or streaks behind?

First, use a microfiber cloth to wipe away any loose dirt and dust. Then, mix a solution of equal parts white vinegar and water and spray it onto the windshield. Use a clean microfiber cloth to wipe the solution in a circular motion. Finally, use a dry cloth to buff out any remaining streaks.

Invest in a good quality glass cleaner that is specifically made for car windows. Make sure to use a clean, lint-free cloth and spray the cleaner directly onto the cloth, not the windshield, to avoid overspray. Wipe in a back and forth motion to remove any dirt or streaks.