Moved into new place, and toilet seat underside has gross yellow/brown pee stains

Before diving into more intensive cleaning methods, start with the basics: mild dish soap, hot water, and a non-scratch scrub pad. This method is gentle yet effective for removing surface grime and light stains. Mix a few drops of dish soap in a bowl of hot water, soak the scrub pad, and gently scrub the underside of the toilet seat.
Make sure to rinse the seat thoroughly with clean water after scrubbing to remove any soap residue. This approach is not only safe for plastic and melamine surfaces but also environmentally friendly. If the stains persist, you can then move on to stronger cleaning solutions.
4. The Classic Power Combo: Baking Soda and White Vinegar Paste
Baking soda and white vinegar are a powerful duo for tackling tough stains. Start by sprinkling a generous amount of baking soda onto the stained areas of the toilet seat. Then, spray or pour white vinegar over the baking soda, allowing it to fizz and bubble. This reaction helps to break down and lift stains.
Let the mixture sit for about 10 to 15 minutes to maximize its effectiveness. Afterward, scrub the area with a non-scratch pad or brush, then rinse thoroughly with water. This method is not only effective but also non-toxic, making it safe for both your bathroom surfaces and the environment.
5. Hydrogen Peroxide and Baking Soda for Deep Stain Lifting
For deeper stains, a combination of hydrogen peroxide and baking soda can offer a potent solution. Mix a paste using 1/2 cup of baking soda and enough hydrogen peroxide to achieve a thick consistency. Apply the paste to the stained areas and allow it to sit for about 20 minutes.
The hydrogen peroxide acts as a bleaching agent, while the baking soda aids in scrubbing away the residue. After the waiting period, scrub the paste with a brush or non-scratch pad, then rinse thoroughly with water to reveal a cleaner surface. This method is particularly effective on more stubborn stains that don't respond to milder cleaning solutions.
6. Magic Eraser Hacks for Plastic and Melamine Toilet Seats 

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