Took the probe inserted it in, pressed the pedal then tried to slide the hair out. Didn’t release. Ok, let’s try one more time.
Inserted probe, pressed pedal, looked at the machine, all lights up, beep for sequence end. No release.
Let’s go to a different hair.
Pressed again the pedal (no more than 2 times per hair). No success. Looked again at the machine.
I was using probe B (inactive - unselected) and in use was probe was A (selected).