I’ve used this before for cleaning my chicken coop and run.
This time I used it to clean my empty greenhouse. I added a few other ingredients to ensure the water marks came off the glass, namely bicarbonate of soda, vinegar, and a few drops of washing up. Filled a big bucket with this mix and water and used a window brush to reach the top windows. Worked really well.
Then turned to use smite with water and washed the car. Worked well with no streaks.