My iphone case messed the back of my iphone 5s with unremovable black dots of dirt. HELP.
I bought a cheap black case for my silver iphone 5s. After 2 weeks of use I removed the case for cleaning, and I found black dots of dirt all around the back of my phone. I tried to clean them with a little bit of water, alcohol with cotton, but nothing.
I don't know what to use that won't damage my iphone. I want to sell it but the black dots are a huge problem.
HOW DO I REMOVE THEM? WHAT SHOULD I USE?
iPhone 5s, iOS 8.3, The iphone's back looks very filthy