My Stick appears in the app but doesn't show any temperature

First, make sure you have removed the probe from the charger, because only then will it start sending temperature signals to your App.
If the temperature is still not displayed after you take the stick out of the charger, you can follow the steps below:
-Are the stick's cap and the contact points on the charger clean? They need to look like new for the stick to charge and activate properly.
See here for comparison:
-Remove the stick from the charger, put it back, press the button and let it charge again overnight before using.
-Restart your phone and update your app if it is not on the latest version.
-When the stick is on the charger, press the button and see if it appears on the " Now Cooking" page of the App.