The hour button is stuck on - on the motherboard

Main buttons (clean, dock, spot) wont work because the hour button is stuck on. I have disassembled the Roomba and exposed the motherboard. I can power the Roomba on and verify that the hour button is still registering as being pressed. I even disassembled the button contact, and it is still registering as pressed. Any further ideas to repair rather than replace the part?

In the pic, there are two buttons flanking the button whose contact I've removed. It seems to me as though the button works by closing the circuit between the circle part and the center. Any guidance would be appreciated. Thanks!

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