I have been using Sqeeky Kleen twice a year for over seven years. They are always able to work me in to their schedule on short notice and they always do a great job. I found that what makes them different than other window cleaners is the cleaner they used. I asked them how they get the window to sparkle like diamonds and they showed me the special cleaning solution they use. They said it cost three times what other window cleaners use but they found it is worth it because they get so many positive comments and repeat business. They also do a great job of cleaning the screens and window tracks.