There is a commercial product in a paste form, found in hardware stores and the internet, called AMAZ, it really works and not too expensive.
Good for shower doors too.
Salt water stains can be removed from window glass with a black and white newspaper. First crumple a dry sheet of newspaper and run it over the stain, then dampen the newspaper and wash the window with it. Finish by running a dry rag over the window.
water
water
To remove coconut water stains, first soak with cold water for a small amount of time. Then, spray the stain with a stain treatment, then wash in cold water.
Oil and grease stains are tough to remove from clothes because they resist water. The water in a washing machine works around the stain. Detergent makes it possible to remove oil and grease stains.
Vinegar.
Pledge will remove water stains from wood as well as apply a protective layer to help keep new stains from forming.
i suppose your wa shing machine leaves stains as well
You can use a solution of two parts water to one part white vinegar to remove water stains from glassware.
Kaboom! Kaboom!
It is true that water alone cannot remove greasy stains from clothing. Alcohol usually can because it is a solvent.
there is a product called GLACIERWASH