Touchscreen not responding. Can't Factory reset!

Hi everyone! so my phone was working perfectly and after going for a run the touchscreen stopped working, the phone still works fine, i can get messages and see them in the notification screen, i can even call using siri but i the touchscreen won't recognise my fingers. I tried cleaning it and reseting it (holding lock and home buttons) several times, touchscreen remains irresponsive. i can't do a factory reset because itunes asks me to dis engage Find My iPhone from my phone, (i don't have any other device to turn FMiP off either). And won't let me restore without me entering the passcode (which of course i can't because of the touchscreen). Any suggestions?

Thanks in advance!