not to worry. Apple will gladly provide a replacement in exchange for USD$19

https://www.apple.com/shop/product/mw693am/a/polishing-cloth

I thought the same. I had no idea there was a special cloth in the box. I'll have to dig it up and search for it. It sounds like a quality microfiber cloth is still fine though.

Yeah, it was in the box with all the compliance paperwork, where the stickers used to be.