Troubleshooting Paperwhite freezing

I got a Paperwhite for Christmas.

Every day, the first time I use it, the touch screen does not respond to my stylus. I then "restart" it, and everything is fine for the rest of the day.

It's a pain the neck, and a waste of five minutes every day, but the situation is not like the thing never works.

Is this a common problem? Do you think I should exchange it for another?

Thanks!