The answer to 'why is my window discolored' is that there are several common causes, including mineral buildup, hard water stains, and environmental factors like dirt and grime. Discoloration can appear as a hazy, cloudy, or streaked appearance on the glass.
Mineral buildup from hard water is one of the most common culprits. Over time, minerals like calcium and lime can leave a white or cloudy film on the surface. Hard water stains are another common issue, forming from the evaporation of water droplets. Environmental factors like dirt, dust, and pollution can also lead to discoloration and streaks on windows.