Many of my RDAs have an annoying tendency to leak eliquid past the o-rings that seal the sleeve to the base and all over the top of my mods. I've found that if I install a set of cooling fins beneath the rda, such as the ones made by hcigar (search "Atomizer Cooling Fin Heatsink") - no more leaks. Thick high VG juices in particular are just stopped in their tracks. And a little less heat from the atty reaches your mod, but that's just a bonus for me. The increase in resistance is minimal, which is cool. You can find these things for less than $5.