iPhone 6 unresponsive screen

I've had it less than a year, and it started acting up about 5-6 weeks ago. I have an appointment at the Genius bar in about an hour and a half from now. But I thought I'd drop in here in case anyone has had similar issues and how you got it resolved.

I can unlock it, and most of the time it will work fine. When it has been in my pocket for a while, sometimes it will freeze up. Replying to a text or reading an email and it will just quit responding to touch. Usually I can lock it and then unlock it, and it works fine after that. Sometimes it takes repeating this a time or two. Sometimes I just do a hard reset, and that seems to fix it for a while. I've restored it to factory setup, I've upgraded to the latest iOS, and I have reset it on the computer instead of doing a factory reset from the phone. It still has issues. I think it is hardware related and not the software, but it could be.

It is still under warranty, so I'm hoping they will replace the screen or just give me a replacement phone if that isn't an option. I've never got it wet, and it has been in an otterbox since the day I bought it.