Well, just used winsol on my living room window. We had some staining on it due to me taking 3 months to remove the spray on Christmas snow from last year. It's come up fairly well but I have to say I was expecting better results.
Do you guys leave it on to soak for a while because I just scrubbed and rinsed almost immediately after applying with an old paintbrush.
There are still some stubborn stains down the edges of the pane but it's got rid of the main bulk of the staining