White vinegar is naturally acidic, which gives it great cleaning power. Measure out about 1 c (240 mL), then dump it into the toilet bowl. Start pouring from the rim, moving the cup all the way around the toilet bowl to cover the entire thing.[2]
Although it can be tempting to use apple cider vinegar, its brown color has the potential to stain a white toilet. Stick to white vinegar if you don’t want to discolor your toilet bowl accidentally.
Let the vinegar sit overnight
This will help tackle tough stains. Close the lid and let the vinegar sit for as long as you can (8 hours is ideal). While you’re waiting, feel free to tackle the rest of your bathroom to get the deep cleaning out of the way.[3] This is especially important if you’re dealing with hard water stains, since those can take a while to dissolve. In a toilet, hard water stains are usually brown or rust-colored, and they usually don’t come off with gentle scrubbing.
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