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1. Mix salt and vinegar together, stir, dilute the salt in vinegar, heat, dip the liquid with an absorbent sponge or rag, put it on the rust spot, and cover it for more than 20 minutes. Then use a coarse cloth dipped in a salt and vinegar mixture and scrub vigorously to remove.
2. Use white vinegar: mix it with water in a ratio of 1 5 to easily remove scale. The scale in the faucet and other places is more stubborn, you can remove it and soak it in white vinegar for 20 minutes, and the scale will disappear.
3. Pour the leftover cola into it and flush it after an hour.
4. It can be easily removed with a small glass of white wine.
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Sulfuric acid, which is guaranteed to leave no traces, is used in many ways.
If the material is acrylic, you can wash it with toothpaste, and if it is ceramic, you can use a special toilet cleaner.
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How to deal with water stains in the toilet:
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Here's a recipe for you: pour leftover Coke into it, flush it after an hour, and you're good to go.
Try using laundry detergent or soap.