This just started acting up earlier today. One of my grands seems to have a slight delay when I hit the firing button. Was noticing some miss-fires, but it seems that if I mash the button, then wait to hear the atty sizzle it vapes just fine. If I just put it to my lips and vape like normal I still get some miss-fires. Got a fresh batt and added a bit of noalux to the pin and same deal. Oh, and brand new spring as well. Its not really bothersome, just a little odd.