My coils seem to only last a day or two before I get a hotspot or multiple hotspots. This isn't normal is it? I've been using 28g kanthal, 10 wraps dual coils. Usually about .8 ohms. I vape it at about 40 watts. I've got an IPV3 with a Plume Veil and I forget what brand batteries. But I know they're good for down to .02 ohms.