I have noticed that my cartos and Evod coils are burning out really fast over the past few weeks. I have them on a Vamo V5 mod and usually vape at 8 watts, which gives me 4.1 volts. I used to be able to get a week plus out of my cartos before they would need to be changed. Is it possible that the Vamo is killing them out faster now. I know it's a cheap mod. I also recently stepped my nic level down to 12mg. I'm not hitting it any more that I usually do. If anyone have some suggestions, I'm all ears. Thanks!