Refillable bathroom cleaning products

[WannabeMathematician]

I live in a very hard water area. Does anyone have any reccomendations for a refillable cleaning product for the bathroom that will cut through limescale?

I'm trying to cut down on plastic.

The Method stuff is good. Concentrate bottle is £5-6 but that should fill 10/12 bottles.
Nothing comes close to cleaning my shower like the Method shower spray, also hard water area,but it's so expensive now the concentrate will have to do.

@AlphaAlpha Thanks!

If you don't mind solid products rather than liquids Planet Detox does a great cleaning bar that has pumice in as a mild abrasive. Wet, wipe over the area and then run down with a cloth. Or wet a cloth and rub over the bar for a bit of lather and clean. The bars last forever. The toilet scrub is good too.