Hopefully this hasn't been covered before, if so, my apologies. Couldn't find much on this topic. Have the Ego-C with joyetech atty's. Read so much on how long they last and the range can be long or short. I think a lot of us use the atty until it just simply quits working, but I'm wondering. I've used one for about 6 weeks now. Have cleaned it twice via the Everclear method and has worked pretty good, I thought. Last night, I put in a new one and Holy Cow Batman, what a difference, anywhere from throat hit to taste. What exactly happened? Do the coils lose their efficiency over time? I had thought that the new one wouldn't have any slag or anything on the coil itself, but I've cleaned the old one a couple of times and worked OK. Do they just simply get worn out? I mean, they will still work per se, but not as good as a brand new one. How long are some of ya'll using an atty before you replace it? I mean, I hate to throw old a usable atty, but that difference was amazing and they aren't that all expensive, but it's the principal!!! I'm the old school of thought....if it ain't broke, don't throw it out and don't fix it! Curious as to what kind of life span some others are getting out of these atty's. Remember, these are joyetech and not those cheap imitations.