I find cleaning the inside of windows exhausting, the window cleaner does the outside which then makes the inside look even dirtier. I visited Lakeland this week and bought this tool. I tried it this morning on my very high windows. The first problem was the lack of any real instructions, so I did what seemed sensible and my windows are cleaner, but I had to find another squeegee as the one on the "mop" did not do a very good job due to its hardness. Altogether I was not as pleased as I hoped, easier than using a spray and duster but rather messy. Rather disappointed.