Great, gentle cleaner for soap scum residue.
I have found baking soda to be the best cleaning agent for soap scum in sinks.  It is very easy on the porcelain and removes scum easily.  I like the shakers but was unable to find another one locally to replace the one I used for years.  I refill the shaker from a large bag of baking soda and the shakers do last for years.  I really didn't need 6 of these so I gave 2 each to my sons to use in their sinks, lol.
Rating: 5 stars