anyone have this problem? I have two Colibri II (that's all I know about the lighter...they're silver,rectangular) lighters and both get very hot if i hold down the button for over 10-15 seconds (the button in particular gets hot). is this normal? my last lighter didn't do this, but they both do it, so it makes me wonder if it's a defect or design flaw or if this is common (i've only had one other lighter before these) any ideas?