I changed the CLEAN_NOZZLE macro to cool the nozzle to 130 C while scrubbing it in the silicone wiper pad so it doesn’t ooze after it’s cleaned, which can leave a dot of cool filament on the nozzle tip that causes the subsequent bed probing Z offset to be too high, resulting in failed prints. It’s in this thread:
My solution isn’t the simplest or best approach but it requires minor changes to the existing CLEAN_NOZZLE macro so it’s easy to try, and reverse if you don’t like it.
I like leaving the cool nozzle in the silicone wiper so it can’t leave anything on the bed, but I think I’ll leave the cool nozzle above the wiper pad after it has been scrubbed clean to ensure that no little pieces of filament in the silicone wiper pad can re-contaminate the nozzle.
After each Zero print, I remove the printed part, peel the little prime stripe (it looks like an exclamation point!) off the build plate next to the silicone wiper pad, pull the cooled ooze from the nozzle, and I run my fingernail across the silicone wiper pad to remove any plastic, so the printer is ready for the next use.