I've only used one rda before and I'm just now learning to build my own coils. Typically the guys at the vape shop will build me a coil that will clock in at around .3 ohms. Now my issue is, as soon as they make it.. it will work great for the first 5 hits then it becomes dry.. Then all this strange stuff happens with the RDA.. the RDA is the TURBO by Tobeco.. It's got a little cooling fan inside that makes a whistling sound but when it does work right blows crazy clouds at around 80-120 watts. Now almost everytime I use the damn thing, the ohms will suddenly jump up to .5 and when I go to hit it and keep in my mind its not dry and full of juice.. I'll get the nastiest hit that burns so bad It's almost as bad as a dry hit, but it's not a dry it. I usually go in there with the screwdriver make sure the cotton is grounded and just move .... around a bit, fire it until it goes back down to .3ohms.. then I know it's good to go again and I won't be inhaling what feels and burns like burnt metal almost and just sets my throat on fire. This can't be normal for the RDA'S.. What could be causing this? It'll literally happen the same day the coil is built by the guys. Any explanations would be greatly appreciated guys! Cheers.