Calibrate temp on Aeon Multisensor?

I have a handful of Aeon Multisensors in my home. All of them are the older, round style sensor. Some are the gen5 Z-Wave Plus versions, and some are the model before that. I discovered recently that none of them are overly accurate with temperatures. They’re all reporting temps about 3-5 degrees colder than it actually is. I’m trying to figure out how to calibrate them. It looks like I may need to use a custom device type, but I’m not sure which one or where to find it. Would greatly appreciate some help.