Iphone is cold and touchscreen not working?

So I woke up this morning and used my phone, but nothing is working. I can't slide the lock screen button or open any apps, all I can do is unlock my phone with the fingerprint scanner. I looked it up and apparently when the phone gets cold, the lcd screen doesn't work properly or something? I left my phone out on the table all night. How can I fix it?

Added (1). edit: I restarted my phone and it works now

It has to get Really cold for this to happen. It's not your issue unless it was below 32 degrees.

I actually tired this at college - we put a friend's 5S into the freezer in the staff room (measured at 2 degrees Celsius, or about 35 degrees or so) for 30 minutes. It worked fine.

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