I found there is a fine line between "too-loose/hot-spot" and "too-tight/shorting". Here are some tricks I've come across and tried. may have to try a few of these before you get one that works well:
Have you tried cotton over your SS wick, rather than cigarette paper? I tried it, and had NO shorts. Took a cotton swab (could have used a cotton ball) and rolled the wick against the cotton to snag some fibers...maybe 1/4 of the swab end in total. Ran a tank or 2 through it with some new DIY ejuice. Didn't like the flavor it gave--not sure if it was my DIY or the wick. I removed the wick, peeled the cotton off, and now have a plain SS wick.
Wind the coil around a suitably sized drill bit (the size that fits the wick hole), ball-point pen refill, or in my case, a 'yarn needle' (large needle from craft section at Walmart.) Leave the drill bit in the coil and then connect to the screws, to keep coil from being deformed while you connect it. Then carefully remove the drill bit. Your wick should have been rolled small enough to fit the did hole, and thus barely fit inside the coil. I've done this with SS wick. I've also done this with cotton wick.
Currently trying a 'glass bead' on the top wire from the coil (Walmart craft section again: GLASS seed beads, without metal shiny centers). Bead is supposed to keep you from getting the wick/coil too close to the center post, and will absorb some of the heat from the coil-to-center-post to keep that from glowing red as quickly. Just thread one on the wire before you attach to center post. If you pull the wire (top wrap on the wick) too tightly, it will scrape off the oxidation, and short to the wick.
Remove the wick, cover in ejuice, and light it on fire a few more times. Maybe you didn't oxidize enough the first time?
I've only had my did-clone a couple of weeks, and have been experimenting to see what worked well, and what didn't. Pointed tweezers and jeweller's loupe help here.