INKBIRD IBBQ-4T Temperature Calibration

I’ve only had my IBBQ-4T for 7 months and none of the probes are properly calibrated anymore. I know that you can calibrate via the app, but it only allows for a ± 12 degrees and my probes are off by about 30 degrees. Are the probes damaged? How do I fix this?

Please put the probe and probe’s cable (excluding the probe’s plug) in a 150C (302 F) oven for 30 minutes, then test it with boiling water ( please hang the probes and do not let it touch the container). Can it work?
Please note that the cable of the probe (silver wire) is not waterproof. Please do not immerse the cable in the water when washing the temperature probe.
Otherwise, it will show an incorrect temperature if there is water in the cable.
Please do not put the probe/the probe’s cable in the fire or place it at which temperature higher than 250C/482F. Otherwise, the probe and the cable will be damaged.

I tried this today and now none of the probes are being recognized at atll.

Please email with order information, pictures of the probe readings, and a link to this post.