hello. i'm trying to clean back of my mi mix 2s. my phone is white so it's pretty annoying to have dark spot on the back of the phone. the dirt is stuck in the inscription engraved in the ceramic back of the phone (see pictures ). the inner surface of the thin groove that forms the letters is coarse so its pretty hard to get rid of it. i think the dirt may come from jeans where i put my phone. anyone know how to get rid of this dark spot ? im hopeless :'( [sorry for my English]
