Tub and Shower Cleaner beth colvin June 20, 2012 0 Comments Related Stories Old, everyday is new when cleaning house Advocate-Tested RecipeTub and Shower CleanerRecipe is from Beth Colvin. We can’t guarantee any cleaner on all surfaces. Please spot-check before using any cleaner.2 to 3 lemons1/4 cup kosher salt1. Halve lemons. Dip each half in salt and sprinkle salt over the bottom of the tub.2. Scrub the tub using lemon halves, squeezing it as you go. Continue dipping the lemon on salt from the tub as you scrub.3. Rinse the tub of pulp and salt.