Unger Professional Streak-Free EasyGlide Glass Cleaner Concentrate (Makes 100 Gallons), 1 Gallon

This cleaner works great!We have huge tall windows and we use this outside. Just spray it, rinse it and no streaks.

This is the best window cleaner I have ever used!!!!!!

I'm old, I've used a ton of different cleaning products through my life. I ordered this window cleaner as an after thought while buying a new squeegee. 2 capfuls make 1 GALLON of solution. I did all the windows in my house with 4 CAPFULS! It's incredibly concentrated. It works better than anything I've ever used on windows and trim. Streak Free, Cut through a year of dirt, grime, bird turds etc. I almost can't believe how well it worked... and I'll have this gallon for the rest of my life. Worth every penny! Smells good too.

I think some windows have to be pre-cleaned before using this cleaner because it really didn't clean our outside windows very well and it did leave a film. I real a review where someone cleaned their windows with soap and water and then used this for the shine the next day and that worked great for them. That's double duty though and we have 16 large windows so I don't want to do them all twice. I will try this again after washing the windows with soap and water to see if it's worth the two-step method though. Since others get great results it's probably a good product for certain situations.The bigger issue for me is the very strong smell. I know that many people don't mind this kind of smell (after all, lots of people think Pine-sol is great!) but I'm sensitive to odors and this stuff about chokes me. The fact that my allergies are acting up right now probably doesn't help but just know that if you are sensitive to strong odors, this stuff may not be for you.

Does a great job. No streaking