Just mix the two ingredients to make a paste and scrub your shower and tub with a cleaning cloth.
Rinse well after scrubbing.
The mixture cuts through soap scum and hard water and leaves everything sparkly clean and smelling fresh.
To make the scrubbing easier, I use a dish-scrubber wand.
Like I said, super easy and super cheap!
(Sorry no before/after pics of my shower. When I asked Soprano if I should put pics of our dirty shower online, she emphatically said that it would not be a good idea! HaHa Yeah.... it was that bad!)