How to clean the sweat stain (I think?) from the couch?

It looks like stains from a dog or cat that likes to lay there. There are a lot of products for furniture stains. Try resolve for pet stains or a designated upholstery cleaner.

I would try an upholstery cleaner

Resolve carpet cleaner should get that up. You can find it at most grocery stores

You could contact the manufacturer of your couch and ask them what they would recommend. Their website might even have some care and cleaning instructions.

I also get the impression that this may be some kind of greasy stain, whether body oil from person or pet or something someone unknowingly brushed into and transferred from their clothing.

Good luck!

Unless the couch is a high end brand-name piece of furniture constructed in the same country where you live, IMO, trying to contact the manufacturer would be a fruitless endeavour. Most ordinary furniture is manufactured overseas these days.

Do you have a pet that has been sitting on the couch?

The discolouration could also be due to sweat/warm bare skin against the fabric, or some dye coming out of clothing that the person sitting on the couch has been wearing.

Try an upholstery cleaner, then after the spot is cleaned and dried, I would suggest you spray it with a protectant such as Scotchguard spray.

https://www.realhomes.com/buying-guides/the-best-upholstery-cleaner

Hi! Look for a tag on the furniture for cleaning instructions. Meanwhile, my go to for spot cleaning is Resolve spray. It's in the aisle with the cleaning products. I use it for carpet and upholstery. Good luck and stay safe!

Try resolve carpet cleaner. Blot, don’t rub. If it’s sweat, it’s oily too. You may have to do it 2-3 times. Try it on an inconspicuous spot.

Hello,

Use a Steam Cleaner, or maybe "1001" cleaner diluted.

This is the best thins I found after trying everything on a chair that had a much worse stain than that. You point and spray and it just disappears.

https://www.amazon.com/Campanellis-Professional-Formula-Remover-Aerosol/dp/B07DP2BFG6

Vacuum your couch so you're not rubbing in dirt or debris while cleaning. In the bucket, mix about 2 cups of distilled water with 1 tablespoon of dishwashing liquid and 1 tablespoon of vinegar. Dampen a microfiber cloth with your cleaning solution. Gently blot any stained areas with the cloth.

Here's my tutorial for couch cleaning https://chascrazycreations.com/how-to-deep-clean-your-couch/

Hello Nova,

Try steam cleaning it!

You can use a shampooer with an attachment. That's how I clean my couch.

Hello Nova, hope this helps you out,

1. Mix one teaspoon of liquid hand dishwashing detergent and one tablespoon of ammonia with two cups of cool water.
2. Using a clean white cloth, sponge the stain with the detergent/ammonia solution.
3. Blot until the liquid is absorbed.

Hometalk has a full guide on how to clean a couch here: https://www.hometalk.com/diy/in-depth-guides/how-to-clean-a-couch-44446043

Or there are some great sofa cleaning hacks here: https://www.hometalk.com/diy/clean/furniture/sofa-cleaning-hacks-44647534

Hi Nova, hope this helps you out, it has step by step instruction

https://tomsupholsterycleaning.com.au/how-to-handle-sweat-stains-and-odour-of-couch/