After having your home or building pressure washed it may be necessary to have your windows cleaned. Normally a pressure washing company will use the properties water source to complete a job to avoid the high cost of hauling water to the job site.
Most of the time, even if the properties water is softened inside, it is not at the outside spigot. There is no way of knowing how hard the water may be. Water hardness is determined by the amount of calcium and mineral deposits contained in the water.
When water is extremely hard it can leave hard water streaks and spots on glass after it dries. This is something that a pressure washing contractor cannot avoid. Some contractors use a rinse aid which helps but it is not full proof. A lot of people ask the pressure washing contractor if they offer window cleaning or if they know of a window cleaning professional.
Some may choose to clean the windows themselves. Here are some window cleaning tips to remove hard water streaks and spots. Use newspaper instead of paper towel and try this homemade window cleaning solution; combine 2 cups of water, 1/4 cup of white distilled vinegar, and up to 1/2 teaspoon of liquid soap or detergent in a spray bottle. For extremely tough spots increase the amount of vinegar. Apple cider also works if you do not have vinegar.