More like when do they break...If you use chocolaty juices, then watch for sugar build up. Can't miss it, looks like straight caramelization. Before it gets that bad, run hot water through the head and move the wicks.
I fill the tank, let it sit 30 minutes and vape. I've never had to break in a new head, they've always worked great. Letting the vivi wick up for those first 30 minutes has proved important for me.
I fill the tank, let it sit 30 minutes and vape. I've never had to break in a new head, they've always worked great. Letting the vivi wick up for those first 30 minutes has proved important for me.
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