Mini Vivi heads...how do you know when to replace?

[redddog]

Hey guys. Just wondering. I go through 1-2 mls a day or so and I'm using a couple 650 spinners. It's been about a month or so and I've not really seen a difference in performance out of the 2 mini novas I use.

What am I looking for to know when to replace?

Thanks

 

[Garemlin]

Muted taste. Consistent leaking. Reduced vapor. Those are the telltale signs that it is time to replace. I have been getting an average of a month out of my heads. I am setting them aside and going to try to clean a batch of them to see if it works.