Like Iffy said... how do you know that they are burnt out/dead? Have you tested them with a multi-meter? Are you sure the posts are connecting?
If so, Note that the e-power is a "3.7
mod". It's battery-level voltage. Starts at 4.2 volts, hovers round the 3.6/37 mark, and then goes low and cuts off around 3.2 volts. Depending on the resistance of the atty, it could be too hot. 1.5 ohms on 3.7 volts is 9.13 watts. So... IDK what your ohm's are but that could be the cause.
Also, are you dripping, or using carts? How's the vapor production? When you say you keep it wet... how?
Clean em out if you want (or just blow the primer out), but it probably has zero to do with primer.
The standard atty should have worked. So you either have a connection issue, or a over-heat issue probably caused by poor wicking. Could be a fluke with that std atty too and the other LRs fried due to over-heat. Hard to tell from here. Drip a drop or two strait into the atty. How's it
vape?