How to remove ingrained limescale on glass shower surround please?

[MaggieW]

Our glass shower surround has quite ingrained limescale. I've used a scourer and Cif but it doesn't seem to remove all of it. What can I use to end up with gleaming glass please?

I use carpet cleaning foam if the doors arn't too bad

Otherwise. Stardrops all round cleaner....orange liquid diluted in warm water then use a pan pal dipped in the solution and scrub. The pan pal needs to be dripping wet, lots of solution in it to work effectively.

Wear rubber gloves, pan pals wreck your nails.