Degreasing Sweat Stains out of this King Ranch leather seat!

So, I am at a loss. I spent today trying to get the sweat stain out of this King Ranch leather seat. I applied Degreaser over and over again. Each time I let it set 10 - 30 min before rinsing with your Acidifier 2.0. I tried scrubbing with the brush, with the spongy side of the Eraser and even the orange side. I can't seem to get any of the stain to come out at all. All I have seemed to do is mess up the leather even further. I am completely flummoxed. In an act of desperation I have applied Degreaser just now and plan to leave it on over night to sink in.

Can you give me some advice? I don't know what to do. I have included some photos to show you the dark sweat stain I am talking about.

Cheers
Todd


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