Water-based sandpaper
This product is used by bodybuilders to refine automobile paints. It’s abrasive paper, similar to sandpaper, but with water. Be careful to buy the right product so as not to scratch the shower glass.

Pour water on the shower glass using a spray bottle, then sand with water. The limescale will come off immediately. Then dry it with a clean cloth.

Of the three tips for cleaning the shower glass, the last one is definitely our favorite because it is the most effective and the quickest to put into practice. But remember to make sure you buy damp sandpaper to avoid making a mess.