The white sneakers that I just washed a few days ago have been worn all day today. Why did you dye your white socks yellow? But the inside of the shoes is not yellow. . Only the bottom of the sock ...

You didn't rinse it clean after washing. Dirty water accumulated around the insole (this position is the most difficult to dry thoroughly) and was absorbed by white socks, so it turned yellow. White socks suck dirty water, so shoes are not yellow. This is the same as putting a layer of toilet paper on the white sneakers when I was a child. When it is dry, I will find that the toilet paper is yellow around it.