5s touch screen unresponsive

Merry Christmas everyone. Bought a 5s less than a week ago and have been noticing that at random times my touchscreen becomes unresponsive. It seems to be a sporadic issue because I haven't even able to replicate it, just seems to happen when it feels like it. I can still use the home button to exit an app or multitask or use Siri. Locking and unlocking the phone fixes the issue only temporarily. I vaguely remember hearing nilay say on a verge cast that touch ID crashes in the background for him and makes his phone unresponsive but I haven't been able to find any information on the net on this so I'm wondering if anyone else with a 5s is experiencing this or if I should just take this back for a new one. Thanks for any input.