Dometic CFX Control Panel Help

CFX75DZ (not the CFX3) several years old and not used much other than garage duty and light trips. The “+” button has stopped “responding”. It still feels as if it clicks, but it does not adjust the temp up. I’ve tried spraying contact cleaner in the area but no-go. Any suggestions before I spend $100 on a new board or (yikes) find a Dometic service center?

Side note: I’m not particularly happy with Dometic right now. Our Dometic 2-way fridge in the RV took a dump…10 days after the warranty expired. All I get from them is ?‍♂️
 

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