I just got a 901 atty in today, this is my first time using a atty, I normally use CE4 clearo and cartos. The batteries i'm using it on is Echo 650 808 thread and Echo 1300 808 thread, all sealed. The atty worked perfect on the 650 batts for about 30 min. awesome flavor and so much vapor it filled up the room. But when I put it on my 1300 batt it don't fire, now it won't hardly fire on the 650 batts unless i put my finger over the litte hole at the bottome of the atty. What is causing it to do that? Only firing when I cover that small hole up. I do have some adaptors that I got and its still the same when using adaptors, it worked perfect for a good 20-30 until i unscrewed it to try another batt now it hardly fires on anything. What i'm I doing wrong here? 
