Had my mini nautilus just a week. Had a few problems with not much vapour and gurgling but seem to be getting ok with it after advice on this forum. Thanks guys. I always tend to vape menthol or fruit flavours which are light in colour. Today I wanted to try something different so tried a dark caramel juice. The taste was disgusting. Just tasted really burnt. I stuck with it all day thinking the flavouring my come through. By the end of the day the taste was so burnt I thought my coil must be burnt out. I tipped the juice out of the tank and thought I would just try putting some of my normal juice in. Some blackjack. The taste was amazing again so not the coil. Was wondering do these nautilus not like the dark juices? Think I may have read some where there not good with coils. ??