i think i messed up my camera lens that's on the back cover......
 

so i took out the back cover off my sprint tp and sprayed lens cleaner in it to clean and get the dust out. but now it left a residue on the lens that seems impossible to get out. is there anything i can do about this? i think camera quality looks the same though but this just bugs me. FYI: i sprayed the back cover's lens not the phones camera.