Stiff power button anyone? topic

My power button has gone stiff on me, cant even feel the click anymore. Power button still works don't get me wrong, but it just feels really stiff and, cant even really full the button push down when you click on it.

Anyone have this issue? I'm pretty sure warranty covers it right? I dropped my phone a few times, no cracks or anything just a couple of scrapes, will this cause issues for warranty?