Streak-free cleaners are specially formulated cleaning solutions designed to leave surfaces clear and shiny without any residue. They are commonly used on glass, mirrors, and other shiny surfaces where streaks can be particularly noticeable. These cleaners often contain ingredients that help dissolve dirt and grime while preventing streaks from forming during the cleaning process. Many streak-free cleaners are available in spray bottles for easy application. Some popular brands include Windex and Method. When using these products, it's important to follow the instructions for the best results, often recommending the use of a microfiber cloth to enhance the streak-free finish.