Could someone please advise me on how to best use the sub Ohm cartridges on the pro series 3? It has a slash through the pg on the box possibly implying no eliquid that contains any pg content at all or hopefully implying no 100% pg liquid. I do not use 100% VG liquid so I have been using them with my normal mixes. I understand they drain the battery faster and consume more liquid but it's worth the trade off for the improvemed hit and boost in vapor. Are there any other problems that using them with basic eliquids could cause?