Vintage legacy leather Coach Saddle bag purse

Super cute legacy vintage Coach with locking brass clasp. Tried clean the leather however the inside has some sort of glue stuck to it. I tried to get it off with warm rag and saddle soap but did not want to be to rough with the soft leather. Most has been removed and he last picture is what is left. Other than that there’s tons of life left in this purse and it’s not noticeable at all.