Been having problems with a leaky tank, & google just took me to a thread under clearomizers called: "What causes a mini nova tank to leak?" Well, Lochrian's post (no.5) exactly described my problem (wonky air tube) - and the solution!
I wanted to thank him/her right there in the thread, but because I'm new I couldn't; so just wanted to give my vote of thanx here: you have just saved me from having to buy a new clearo (or, going over to cartos - except that, apart from Jacvapour ones, I usually manage to burn them within minutes/hours)