Iphone 5 top button problem

I bought my iphone 5 a couple of months ago and NOT once have i dropped it. The top button (lock button/powerbutton) sometimes gets stuck. Like i press it and my phone doesn't close/open i have to do it numerous times in order to close/open my phone what's wrong? I think its because i print shoot alot… I don't know what should i do i have NO warranty. I lost my iphone box and the info with it. Everything is perfect expect for the top button

The iPhone 5 has had multiple complaints about the lock button getting stuck and not working correctly. If you take it to your nearest apple retail store they will replace it 100% as long as that is the only problem. You will have to sign to say you're over the age of 18. Other than that you can get it replaced because it was a manufacturing problem.

My lock button got stuck too, what you can do is go to settings --> general --> accessibility --> assistivetouch --> on. Then a little ball should appear on the screen touch it --> touch device --> lock screen. To turn it off when you touch lock screen hold it. To turn it on connect it to the charger.
You can also just take it to the apple store to get it fixed.