Leave limescale in the past

Normal all-purpose cleaners often lose the battle against limescale and soap residue. Especially when your shower hasn't been cleaned in a while (no judgment here), removing limescale from taps, shower walls, and doors can be tough. That's a shame, because it doesn't look appealing. You could buy expensive cleaners, but this mixture is much cheaper and you probably already have the ingredients in your kitchen cupboard.