whenever I read one of these threads, I wonder why people simply do not buy themselves a multimeter which can be purchased for the price of an atty from places like Harbor Freight to test the atty. They really are quite easy to use and do not require any formal education in electronics.
Depending on the juice, vaping style, resistance, voltage, and supplier, attys can die very quickly. I had a bunch of 30 cheep attys from China that died within a month-despite a so called 6 month guarantee. I have been fighting for my guarantee replacements since March. After much experimenting with a variety of different manufacturers, I find that the Joye's are worth the money.
SINCE AN ATTY IS A DISPOSABLE/CONSUMBABLE, you should always keep a few extras on hand. I know it's a cost factor, and that money is tight in this economy, but it boggles my mind to think that people do not hesitate to spend $70/week on analogs (that's what a 1.5 pack/day habit costs in Michigan) and will not spend a few dollars to keep spares of e cig supplies.
No amount of cleaning, "resuscitation", "reviving", or voodoo ritual will help an atty where coil is burnt through. When you do have an open circuit, your have one of two choices: toss it or try to rebuild it. I would not recommend the latter for the faint of heart and those lacking fine mechanical skills.
Sorry for the rant, but I just found out that a golf buddy of mine was diagnosed with an advanced stage of lung cancer. He actually got started on e cigs before me, but gave up after a month because it was too complicated and expensive.