Not Vinegar, Not Baking Soda: People Are Sprinkling This in Their Toilet Before Bed
Brown or yellow marks inside a toilet can remain after scrubbing because the discoloration may be attached to mineral scale rather than the porcelain itself. Instead of reaching for vinegar or baking soda, some people sprinkle citric acid powder into the bowl before bed and leave it there overnight. Citric acid targets the mineral deposit holding the stain. Given enough contact time, the acid can dissolve limescale and leave less buildup for the toilet brush to remove the next morning. In one discussion about stubborn brown toilet stains, several people recommended citric acid after other cleaning methods had failed. Sprinkle citric acid into the bowl before bed Citric acid comes as a white crystalline powder and is also used for descaling kettles and other surfaces affected by hard water. Sprinkle the powder into the toilet bowl so it reaches the mineral buildup. Leaving it overnight gives the acid hours in contact with the scale without the toilet being flushed. One person who ...