Residue or soot from a cook can interfere with your MEATER being able to charge. Using hot water and the rough side of a sponge, vigorously clean the probe focusing on the square metal cap (ambient sensor).
Press the small black button on the front of your MEATER charger. If the small green light above the button does not come on, replace the AAA battery.
MEATER Probes do not automatically connect to devices via Bluetooth without having to go to the app. Make sure to turn off Bluetooth that has previously been used or paired with another enabled device.