This Powerful cleaning concentrate is our most popular solution for a reason. It makes windows sparkle like diamonds and nearly guarantees referrals and return customers. Windows are left residue-free and sparkle while staying cleaner longer and resisting disrt re-deposition. Highly concentrated use only 1/4 ounce per gallon of water. Can be used with water-fed poles, squeegees or just rinsed from the pane, worls great right through the window screens. A polymeric water softener breaks down minerals for a spot-free rinse. Stays wet on hot or windy days; no streaking. Green certified produc, kind to your hands and safe for the planet.