Weird temps after a month and 2 new batteries

I am less than pleased with this thermometer. It has great reviews and everything I wanted, but it's not working out. The batter level continues to show it's low even though I've changed the battery twice. It's also hard to look through the previous temps without shutting off the thermometer. I've had it a month and it gave me good temps until the last 2 weeks. I thought my temps were just high until I temped with second thermometer and found it was much lower. Not sure what's going on our why this one would be so different. I'm disappointed and will probably get a different one

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