How to remove yellow stains from white travel shoes?

White sneakers should be washed with a soft-bristled toothbrush and toothpaste. The most common white toothpaste should be used, that is, the toothpaste itself is white

It is best not to use 84, because it will hurt too much. The fabric of the shoes, and the color of other parts of the shoes may be bleached, but you can use cotton wool dipped in 84 to clean it, so as not to damage other parts.

Be sure to rinse it clean at the end, otherwise it will also turn yellow. It is generally difficult to rinse thoroughly, so it is best to apply tissue paper on it when drying to absorb the remaining residue