Sticky key on 16-inch MacBook Pro

I've seen other entries about sticky keys. Well, the O key on my 16-inch MacBook Pro is doing that. It doesn't stay depressed, but there is a noticeable click and stick when I hit the right side of the keycap and release it, nor does this happen consistently. I've tried canned air and a little bit of alcohol combined with canned air, but the key still sticks.

Does anyone have any additional advice, or am I headed to the Apple Store for a repair?