The answer to 'window grimy' is that windows can become grimy and dirty for a few common reasons, such as environmental factors like dust, pollen, or pollution, or from improper cleaning techniques. Symptoms of grimy windows include streaks, hazy or cloudy glass, and a generally dirty appearance.
To address grimy windows, you can try DIY cleaning methods like using a microfiber cloth, window cleaner, and squeegee. However, if the grease and grime buildup is significant or you're unable to get the windows fully clean, it's best to call a professional window cleaning service. They have the right tools, techniques, and experience to thoroughly clean and restore your windows.