Lost 2 days of baking because my oven thermometer was off by 40 degrees

I kept burning the bottoms of my sourdough loaves and couldn't figure out why until I checked with a second thermometer and realized the one hanging in my oven was reading way high, so I was actually baking at 490 instead of 450. Has anyone else had a thermometer drift that bad, and do you just replace them every year or test them somehow?

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karenf402d ago

Forty degrees off just means you get to eat the mistakes, right?

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