Is this a hard water stain? How to clean this? I scrubbed the top part of the toilet clean but the bottom is hard due to lack of leverage. : r/CleaningTips
Why are There Brown Stains in My Toilet Bowl? – Angel Water
How to clean the brown stains in toilet? Have tried toilet cleaner + scrubbing and baking soda with vinegar to no avail : r/CleaningTips
How to Clean the Worst Hard Water Stains From Your Toilet | Lifehacker