Brush off the dirt on the upper with a brush first, and then spread the expired yogurt evenly on the upper. Wipe it with a dry cloth after drying, and the vamp will be as bright as new, and it can also prevent the leather surface from cracking. This method can be tried. I'm sorry, did you say it was worn for a long time or your own? Long-term wear can refer to the previous method, but it may not be completely removed, just improved, thank you.