How to clean leather stain off of recliner head rest

Here are a couple different hints on cleaning stains from leather. Click on link below.

http://homeguides.sfgate.com/clean-grease-leather-upholstery-93181.html

https://www.hunker.com/13422961/how-to-remove-greasy-head-stains-from-a-leather-sofa

I'm not too sure it can be done. If it's the headrest, I suspect it's hair oil; natural or a hair dressing. Leather is somewhat porous and it really loves oil. Anybody remember putting 'Neatsfoot oil' on baseball gloves? It always darkened them but made the soft and subtle.

The leather company whose products I use, recommend using alcohol.

Is it stain or could it be that the top layer of leather has worn off? I say this because it has happened to my husband's chair.

You can try leather cleaner from automotive car parts store.