I picked up an OMG VV a couple weeks ago, and I love it! Unfortunately, it does not fit in my pocket very well. So when I'm out and about, I often revert back to my trusty EGO. The other day, when I went to take a few puffs off of my EGO with a tank on it, the carto wouldn't fire... I tried out my other tanks that I had used on my OMG VV, and none of them would fire either. They still work fine on the OMG. A new carto fixed the problem. Has this happened to anyone else? Is my OMG VV somehow ruining my cartos? I usually run the VV at 5-6 volts. I'm wondering if the higher voltage is adversely affecting my cartos.