Calcium buildup in the toilet bowl is an unsightly and stubborn problem caused by hard water deposits over time—not fecal matter—and we think it's one of the most challenging cleaning tasks.
This white chalky substance is essentially a mix of calcium and magnesium ... don't rid the "thick" limescale in her toilet bowl, took to the Mrs Hinch Cleaning Tips and Tricks Facebook page.
Toilet seat stains can be an absolute pain to get rid of, especially if you are not using the right cleaning product. Yellow limescale residue can also be an issue if living in an area with hard ...