Not all that often to be honest mate. I tend to use it when I've got a new juice to try out. It gives great flavour. I might re-wick it with cotton at some point, see if it makes any difference. If the flavour is great now with silica, I bet it will be amazing with cotton.
I have promised myself that when my new tanks start to arrive, I will re-wick them with cotton. I have only tried it once befere with an evod, and i think i put too much cotton in LOL; so it weren`t that great.
But i have seen plenty of reviews, and followed your advice; and decided to have another crack at it
