The most likely cause of smearing or streaking after cleaning your windows is residue left on the glass from the cleaner you’re using. Consider diluting the solution and cleaning them again, or use old newspaper to dry the windows after cleaning, as this will soak up any residual material. Additionally, aim to clean your windows on a cool, cloudy day, as cleaners will dry more quickly on the glass if it’s hot and sunny, promoting streaking.

There are several ways to reduce noise coming through your windows. You can seal gaps around the window frames with acoustic caulk or fresh weatherstripping to reduce noise and air leaks. Installing sound-dampening curtains, thick blinds, or shades can also help deaden sound vibrations. For an additional interior barrier, consider installing an acrylic or plexiglass sheet inside the window, which stifles sound while still allowing for outdoor views. Another strategy is to add external barriers, like dense shrubbery or a sturdy fence, to block neighborhood noises. If these methods are not effective enough, it might be time to install new noise-canceling windows.

One of the best professional cleaning solutions that won’t leave streaks is one gallon of distilled or bottled water mixed with 2 to 4 teaspoons of dish soap. Apply using a sponge in a figure-eight motion, and then use a squeegee to remove the majority of the water and soap. You can finish drying with a piece of old black-and-white newspaper to remove any residue for a streak-free clean every time.

Hot water removes grime more efficiently than cold water and evaporates more quickly so that your windows will dry faster. However, you may want to use cold water instead if your windowsill paint is chipping or peeling because heat can worsen this condition.