Dark stains on car upholstery

Factual Questions
1

I wear lots of black. As much as Johnny Cash.
My car’s interior is a light beige.

Recently I noticed that my driver’s seat looks like it has been charred. Today I bought some aerosol upholstery cleaner of a chelonian bent touting the fact that it has oxy in it. After a few applications, sweat and elbow grease the dark marks are still on the seat.

Yeah I know I could get seat covers but I’d like to get them almost new. Does anyone have any suggestions about cleaning car interior upholstery?

2

You might want to consider going to one of those premium car wash places and get them steam cleaned.

3

Just a thought, but if you know the stains are, uh, biological in nature, an enzyme cleaner might do the trick.

I use Resolve Pet Stain Remover on any spot which is food or bodily-fluid created. Works like a charm.

Worth a try, anyway.

4

No, the stains are not biological in nature.