Hi guys,i have iphone 5c in warranty upto march of 2015,i had given my mobile to my cousin weeks before and dont know what he messed up with it.when i got my mobiile back from cousin,on screen left corner i have a yellowish mixed brown spot.By noticng this i took to store near by,they checked it for 15 minutes and showed some fingerprints inside mobile,else damn i had blessed with new iphone.I asked to my cousin about this mess
and he said that he got opened mobile with unathorised service center.My doubt is that can i clean fingerprints inside and can I take mobile to service again,or any other ways to claim my warranty.please help me out of this