Home button not working correctly after front panel replacement

I push it in and it works some times, but more often than not when I release it quickly, the phone thinks I held it in and the voice control app pops up. The button obviously works, but seems like it's sticking. I was considering trying to replace it with a new one, but I don't see that part for sale by itself. Also, sometimes it seems like the button is being pressed even when I'm not touching it.

The front panel glass replacement went good other than that and the fact that I had trouble getting the glass apart from the LCD screen, which caused me to damage the rubber seal around the edge. Before I could see the phone being water resistant if a drop got on the edge of the glass, but now it would seap right in. I can live with that because I have an otter box that will protect it, but the button is a deal breaker. I need to somehow figure that out if possible.

Thanks,

cbrandst