Scrubbing the shower may be an unpleasant chore, but it is usually over quickly. However, when you have hard water, you may find that limescale deposits build upon the tiles and doorway. Limescale, another name for calcium carbonate, causes a tough, crusty accumulation that ranges from green to green in color and can be tough to remove. Scrubbing vigorously can scrape glass doors, so use a cleaner which cuts through the limescale with minimum abrasion.
Bring 1 cup of white vinegar to a boil on the stove or in the fridge. Allow the water to cool until it is extremely hot but no longer bubbling.
Put on a set of rubber gloves to protect your hands and then take the boiling water to the restroom.
Dip a microfiber cloth or sponge to the vinegar and then wipe down the shower door.
Allow the vinegar to work on the stains for 30 minutes.
Rinse the sponge or cloth, wring it out and then sprinkle it with a generous amount of baking soda.
Scrub the door gently using the baking soda.
Pour bottled water on the door to rinse.
Repeat the baking soda shake and rub till all the limescale is gone.