I also think it was the beautiful but dangerous red lining, although there is a strange blue stain! I tried to get it out with alcohol and it was worse... now my 10-year-old daughter is very happy to have inherited her mom's damaged "cow bag"
Any dark or saturated color lining is a risk in a handbag that has lighter color leather or fabric exterior. I know that darker color linings show less dirt and look good longer, but
I can't understand why so many manufacturers use dark fabric linings in their handbags.
The Dooney red cotton lining is a sturdy, high quality fabric.... but it's red. I much prefer
the older Dooney woven linings that were 'woven' and either tan/beige or red/beige.
These linings were also high quality and thick fabric, but much lighter in color.... so it was
easier to see what was inside and no risk of color transfer from the lining onto the leather
or the contents of your handbag. Of course, with a light color lining the risk is that
dirt or coor transfers from your contents onto the lining. I guess there is no perfect answer. I use either pouches or an organizer in many of my handbags.... it keeps the
handbag interior clean. But.... the pouches or organizers do add weight to the carry.
I hope you find some way to remove the stains from your handbag. When you do try
products.... use a Qtip, so as to minimize any damage or spread of color. Also, test
on the least obvious area, just to be sure it doesn't make anything worse. Good luck.