MastTech MS8229 beeps all the time

MastTech MS8229 beeps all the time
Hi I own a MS8229 multimeter for a few years now. It works fairly well except the one (super annoying) thing it does is it beeps whenever it is turned to a current/voltage/resistance measurement. It doesn't matter if the probes are plugged in or not. The beep differs (deeper beep) if the probes aren't plugged in but then it's a high pitched beep when they are removed. The beep goes away if I change it measure lux/audio, etc…

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