hi, I've been vaping for 6 months now and bought an aspire sub ohm cf with the Atlantis tank. I was using .5 coil and the vapour was amazing. I've recently purchased lemo2 and kanger sub tank and been building my own coils. Everytime I vape on .5 I seem to get a burnt taste. I'm vaping on 2.4ohm now and get lots of vapour and favour, just wondering why the sub own coils taste burnt now.