iPhone 5s Power Button Loose/Rattling Noise

Today I had scheduled a Genius Bar appointment for my loose rattling power button. I can hear it rattle when I record video and move around, the video even records the sound and it interferes with the video. It is also bothersome, in general, to have a rattling noise on my phone. The "genius" had me unlock the phone (since I have a passcode/fingerprint I.D) and he took it to the back to take a look at it, came back and said there's nothing wrong and that it's the "vibrating motor." Yeah, sure. I place my finger on the power button and move my phone and it has 0 rattling, when I let go it rattles like a maraca. I then asked him if he could open it and try and fix it for me, and he told me that he had just opened it and everything checked out fine. Another lie, he gave me my phone back unlocked and into my settings. If he opened it it would have been turned off, and on again which would request my passcode which he doesn't have. My previous iPhone 3/4S/5 has never done this and I see it as a simple fix if they were to really open it. I have fully purchased a new iPhone every year for the past 3 years and when I encounter a problem I'm lied to and told there is nothing I can do about it. I'll be scheduling another appointment soon in hopes I get a different employee that will actually help me.

What I want to know is, is there a fix to this?
When I take videos it captures the rattling noises ruining the video.