Maybe this could help:
http://www.e-cigarette-forum.com/forum/gg/335107-ithaka-official-145.html#post9280503 (post #2898)
http://www.e-cigarette-forum.com/forum/gg/335107-ithaka-official-146.html#post9281177 (post #2906)
http://www.e-cigarette-forum.com/forum/gg/335107-ithaka-official-142.html#post9272371 (post #2834)
Gurgling could be because some liquid is going inside the center pin hole (where the air flows to the wick), so maybe doing what Imeo said in the last link could help.
Thank you i resolved the issue with your(and imeo's) help..
