I guess it could be pollen, but I would put my money on some kind of contact. As much as I try to be careful, I end up knocking them around from time to time.
Another vote for Apera. I have the PH60 which features the replaceable probe. As far as I know, you can’t replace the probe on the PH20. The 20 is going for about $50 while the 60 is going for around $80.
Do you remember about how long the Wedding Cake x Sherbert took to finish? I’ve got three of them in week 5 of flower.
Seems like a lot folks (including me) received those as freebies!