The answer to 'why is my window discolored' is that there are several common causes, including mineral buildup, oxidation, and environmental factors. Discoloration can appear as a hazy, cloudy, or even yellowish tint on the glass.
Mineral deposits from hard water are a common culprit, leaving behind a chalky white or gray film. Oxidation can also occur over time, causing the glass to take on a yellowish or brownish hue. Environmental factors like smoke, dirt, and UV exposure can also lead to discoloration.