I have the Vision V3 rebuildable 1.8 ohm on a ego T 650. Vapes like a champ for 2 days then I get a burnt taste and dry hits. Sometimes I cant even hear it fire. I tried a new coil, 2 days of awesome vaping went by and the same thing happens. Can someone tell me if this is normal or if there is a way to get at least a week out of each coil?