Any car upholstery cleaner that you’d recommend?

By Borax and mix it with a little water into a thick paste for stubborn stains , into a runny liquid and into a trigger bottle for normal stains and general cleaning . Add lemon juice for freshness , or mix lemon juice with water into a trigger bottle and mist for fresh smells .

I’ve used murphy’s oil soap on vinyl, leather, and rubber parts of my cars, seems to remove all dirt and stains quite well. not sure about cloth (woolite maybe?)

Car upholstery is pretty much the same as any other, except it gets dirtier. There’s a product called Tech that works better than most.

https://www.techstainremover.com/store/products.php?product_id=4324&storecategory_id=228

Sold at Ace Hardware and a lot of supermarkets.

If you like the car enough you could just replace the seats/get them reupholstered.

It’s surprisingly not THAT expensive (at least if you like the car enough it’s not).