[seemaze]

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

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

[rhplus]

A microfiber cloth apparently so notable that it even has its own Wikipedia page:

https://en.wikipedia.org/wiki/Apple_Polishing_Cloth

[jsheard]

Pay attention to the compatibility list though. If you use the Cloth™ on an iPhone 4 or earlier then you're in uncharted territory, who knows what could happen.

[hammock]

You bought a car that requires premium grade fuel, you gotta pay for the premium grade.