Achieving streak-free windows involves using the right tools and techniques. Begin by selecting a high-quality squeegee and microfiber cloths. Start by wetting the window with a cleaning solution, preferably a mix of water and a mild detergent. Use the squeegee in a top-to-bottom motion, wiping the blade with a clean cloth after each stroke to avoid streaks. Finally, polish the edges with a dry microfiber cloth for a flawless finish. For added effectiveness, use distilled water to avoid mineral deposits that can cause streaks. Regularly cleaning your squeegee blade and replacing it when worn out also ensures better results.