A bit more info:
Attaching a 50 ohm termination to the BNC of the probe cable, I measured (with a DMM) the resistance between tip and ground clip.
Normally, the resistance should be about 390 ohms with the switch in the 1x position, and about 10K in the 10X position.
When I measured the 'yellow' probe, I got 390 ohms to start, but if I wiggled the cable at the probe end, the resistance jumped much higher intermittently.
Thinking the trouble could be an oxidized ground clip, I removed the clip from the probe, inspected it and pushed it back on. There was no oxidation on the clip. Doing this did not change the result of my measurement.
Next I attached the DMM clip to the ground ring on the probe, just below the tip (with the probe hook removed). I got the same intermittent reading. This pretty much eliminates the short ground clip wire.
I checked the remaining 3 probes, and found two of them to be OK. When I went to remove the probe hook tip from the green probe, the probe pin came out, was stuck in the hook tip, leaving no contact on the probe tip. I was able to extract the pin with its plastic base from the hook, but I don't believe this probe is usable.
so I now have just two working probes.
Now figure this:
I bought the scope in Oct 2018, and have hardly used it. I never use the green probe - except once when I first got the scope to test it.
I use the yellow one the most, but still, that's only a handful of times over the time i have owned the scope.
I have always treated the scope and probe kindly. I never kink or fold the cables in any way; only coil the cables up loosely (so as not to put any strain on the probe or BNC) and have stored them in the soft case behind the scope (so they won't scratch the screen).
I don't know what the warranty on the probes is. I purchased the scope from Saelig on 10/02/2018.