I have a (matte) black iPhone 7 Plus and I've kept in a Tech21 EvoMesh case since Day 1. I've noticed that the design of the case is now imprinted into the back of my phone when I take it out of the case.
People are experiencing the same thing with spigen cases and the webbed pattern on the inside of them. I think it has something to do with the case design pressing against the back of the phone inside people's pockets or something like that.
I have a (matte) black iPhone 7 Plus and I've kept in a Tech21 EvoMesh case since Day 1. I've noticed that the design of the case is now imprinted into the back of my phone when I take it out of the case.
I have and it didn't work. Although I just tried again with a damp cloth as one of the posters above you mentioned and it looks like some of it came off, but some of it didn't.
The same thing happened to me with my Tech21 after only leaving it on for 2 days on my matte black 7 Plus. I have now switched to other cases as my primary.
Don't want to wait and see what's going to happen if I continued using that case.
Well. How about trying to loosen the stickiness of the inner layer by applying some baby powder and then wipe it off with some damp cloth. I'm trying it now with my spigen liquid armor casing and see how it goes.