I don’t have any wisdom to share, but I think filtering is a good idea. I didn’t want to do it because it looked too fussy, but it was a lot easier than I thought it would be. The
Filtering Kit that a lot of people buy is presently sold out, but you can recreate the supplies by looking at their list and purchasing separately. The instructional video
here is too long and fussy, but it will give you a good idea of the process. I still don’t understand why one would need to put a filter on the vent needle, since you’re probably going to inject air into the vial later when you dose, but whatever. They probably just want to sell more filters. 🤷🏻♂️
I personally like
this video the best, save for the filter on the venting needle. (I don’t put a filter on the venting needle. Not medical advice.)