When leather becomes hard, how can it become soft without hurting the skin?

Leather should return to oil and volatilize to its original state. Spread the leather coat flat first, dip it in warm water with a towel and wipe it all up and down. When it is dry, wrap the old hen oil that has just been killed with a piece of gauze, rub it, and wipe all parts of the leather coat evenly, then hang it in the shade and wipe all parts with a clean soft cloth. You can wear it for about 20 minutes, not only that (if it is leather shoes, you can also use this method, that is, after the next process, apply polishing shoe polish, sometimes it will be wet by the rain of the kitten, and it will not hurt the cortex. You can use milk at any time after returning oil to prevent leather from cracking and make it soft and beautiful.