
I used them immediately and got them in the mail! I just poured water on the red one and then dried the blue one to dry out the window. If the pane becomes too dry, the blue tends to burst due to friction. I had to clean the windshield on the passenger side again because I guess I didn't do it as well as I did on my side. But afterwards the window looks crystal clear. To be honest I haven't washed the front inner windshield since I bought the car about 2 years ago because it's very difficult, but this product makes it so much easier and you don't need chemical cleaners! After that I just washed them with soap in the sink and hung them up to dry.

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