Update

I took the cover off and there isn't anything sticky on the rubber button pad. There isn't anyhting in there at all that would inhibit the movement. The button just seems bigger than the hole and catches. I think i just need a rubber new button pad.

RTI said to contact the place of purchase, avsmarts.com, alias etronixs, but eric there has not returned emails. they don't stock RTI on their website anymore.