There is a trick suitable for whitening all-white fabrics. Drop two or three drops of blue ink in the basin, make it even, and put the washed clothes in. Because a chemical substance "ferrous ion" contained in blue ink can remove the "sulfonate" substance left when we usually wash white clothes with soap or washing powder, and make the clothes white. White leather shoes are loved by everyone in summer, but they are also very worrying. I'm worried that white leather shoes are too difficult to take care of and some dirty things are difficult to wipe off. Don't worry, let me introduce some tips for removing stains from white leather shoes. First, wipe the dirt on the surface of leather shoes with a wet cloth, and you can see the stains on the shoes. Rub them gently with a rubber. The brightness of the shoes came out. You can't wipe it off with cloth and shoe polish. Apply a thin layer of toothpaste to the hard wound of shoes and wipe it with a rag, and the stains will be less and less. If the stain is heavy, it will be clean after washing it several times. In our daily life, the shoes or sneakers we wear often trip over. We can apply a thin layer of correction fluid to the hard surface and then wipe it evenly with a rag. The white sneakers worn by middle school students will always see yellow marks after they are brushed and dried. Is there any way to make yellow white sneakers white? First, clean the white sneakers, wrap them all in toilet paper, and don't forget to wrap the edges. After the shoes are dried, the yellow marks naturally adsorb on the toilet paper. When the shoes dry quickly, the yellow marks disappear. If the vamp is too dirty, it is best to brush it with soap or washing powder for several times, then brush the toothpaste, and then dry it directly. White toothpaste can play the role of shoe powder. Wash the shoes first, then rinse the soap bubbles off the shoes with clear water and put them in the washing machine to dry. After drying, the upper will not turn yellow. Or foam cleaner (for skin washing or car washing), just rub it frequently.