Awesome thanks. This Woolite detergent is what you're referring to right? https://www.amazon.com/Woolite-Extra-Delicates-Care-Detergent/dp/B002PBT6VG I'm actually living in Thailand and I don't think I can get that here, so I'll need to find an alternative.
I was thinking the same thing. Maybe there was cleaner residue on the balls and it turned yellow after sitting for many many months.
Would I just take a damp washcloth and gently rub the cloth?
I bought a used table that came with Aramith TV Pro Cup balls. The balls looked more yellow than I was expecting, but I figured they had gotten a lot of use and had yellowed over time. The previous owner said he cleaned the balls using Aramith Ball Cleaner. I had the table reclothed with Simonis...