Basically, the stains under the toilet rim are minerals that have stuck to the porcelain. They make a pretty tight bond so you need to dissolve them with acid to remove them. Rust removers are acidic. Vinegar is acetic acid. You can also try lemon juice which is citric acid. For stains...
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Wall, sink, door gap,washing machine tank,etc Shelf life 3 years Certificate ISO,CE,MSDS,Germany EPR,France EPR,etc Packaging and delivery Selling Units: Single item Single package size: 24X16X2.2 cm Single gross weight: 0.097 kg Show more ...