Hi Martyn,
that's what I thought as well. I tried to "clean" it by moving it several times back and forth without any results.

In the end I went ahead and bought replacement probes.

Best regards,
Robert

Greetings everyone, I've recently had one of my probes start behaving erratically and finally not showing a signal anymore unless I switch it to the 1:1 attenuation mode. To the best of my knowledge, the probes I have (basic 60Mhz type, similar to https://www.picotech.com/accessories/passive-oscillo...