How To Get Water Spots Off Glass Doors. And the answer isn’t as simple as you might think. This works so well because the citric acid breaks down the mineral deposits… i think that this method is even more effective than using cleaning vinegar…but that’s just my humble opinion.
For more severe cases the most effective approach is the use of a product called cerium oxide. You need to remember that the longer you wait, the more soap scum will be taken away. Let it sit for about 20 minutes.
And now, it’s time to wipe the doors!
A melamine sponge or magic eraser dipped in warm water. Fortunately, there are several safe, natural methods to remove hard water spots that don’t expose you or your family to fumes or corrosive substances. If you don't like using vinegar, you can use lemon juice instead. Give a solid but gentle rub with the scrub or sponge onto the glass door.