"Did you miss this window; it has spots?"
What is a common cause of spots on a window that has been properly cleaned? This often is mineral deposits. When your water source contains minerals such as calcium and lime, it tends to leave mineral deposits on the glass as the water drops evaporate. If the water contains a lot of TDS or Total Dissolved Solids you can have spotty windows even after only one exposure to such water. However, even if your water has low TDS, you will develop spotty windows over the course of time.When Kamloops built it's new water treatment plant just a few years ago, the TDS coming through our pipes has been quite low. Having said that I still see windows that have minerals deposited on windows from repeated spraying of the windows.
This problem may be unavoidable from sprinklers, however quite often this is the result of the home owner washing the dust from the windows with the garden hose. In the last few months I have cleaned quite a few windows that have been hosed off in this fashion, causing the windows to be spotty. Whether you have a nice view or not, your windows are one of the most important things to consider when it comes time to resell your house. Please take care of your windows. Clean them properly or hire somebody to clean them properly for you. Please stop spraying the dust off your windows with the garden hose.
