After painting the travel shoes, how can I keep them clean without leaving any yellow marks?

There are tips for cleaning and whitening white clothes and shoes. In summer, white clothes become no longer white, so some people resort to using bleach. But some are suitable and some are not. Fabrics such as silk and pure linen are not suitable for bleaching. There is a trick that is suitable for whitening all white fabrics. Put two or three drops of blue ink into the basin, mix it evenly, and put the rinsed clothes in. Because the chemical substance "ferrous iron ions" contained in blue ink can remove the "sulfonate radical" substances left behind when we usually wash white clothes with soap or washing powder, the clothes turn white. White leather shoes in summer are loved by everyone, but they also make people very worried. What worries me is that white leather shoes are so difficult to take care of, and it is difficult to wipe off any dirt they get. Don’t worry, here are some tips on how to remove stains from white leather shoes. First, use a damp cloth to wipe off the soil on the surface of the leather shoes. If you can see the stains on the shoes, gently wipe them with an eraser a few times. The brightness of the shoes comes out. If the stain cannot be wiped off with cloth or shoe polish, apply a thin layer of toothpaste on the bruise on the shoe and wipe it with a rag. The stain will become less and less. If the stain is heavy, it will be clean after wiping it a few times. In daily life, the leather shoes or travel shoes we wear often have bumps and bumps. You can use correction fluid to apply a thin layer on the scratches, and then wipe them evenly with a rag. I always see yellow marks on the white sneakers worn by middle school students after brushing them and drying them. Is there any way to make the yellowed white sneakers white? First, clean the white sneakers and wrap the shoes with toilet paper. Don't forget to wrap the edges of your shoes as well. After the shoes were dried, the yellow marks were naturally absorbed on the toilet paper. The shoes dried quickly and the yellow marks disappeared. If the shoe upper is too dirty, it is best to brush it several times with soap or washing powder, then brush it with toothpaste, and then dry it directly after brushing. White toothpaste can act as shoe powder. Brush the shoes clean first, then rinse off the soap scum on the shoes with clean water, and put them in the washing machine to dry them. After drying, the uppers will not turn yellow.