How can I get rid of impossible water stains?

Question

I have a glass shower door and over the years "water stains" have built up on it and it is now impossible to wash off with regular soap and water.

So what are some good products I can use to get rid of it and make it actually clear?

Answer 1

mr clean magic eraser

Answer 2

Lime-Away mixed with baking soda. Make a paste, apply liberally, let it sit of a few minutes and scrub with a sponge.

Answer 3

In the US, there is "CLR" (calcium, lime, rust), which is basically just an acid.  It works great on this, assuming it's mineral deposits.  Lime-away is a similar product.  Don't mix it with baking soda, though, as it will neutralize the Limeaway (mixing acid with a base).

Also, keep both products away from stainless steel, as it can damage the surface.