I've been using BE112s and 510LRs for quite some time. Am trying my first 510T. I know everyone says that atomizers should last a month but mine start to lose heat and vapor after about 2 weeks. Sometime in the 3rd week I'll toss them or try to clean them. This 510T seems to be fading away after less than a week. Is this normal for this model? Also, I don't see a way to do an overnight drain like one does with normal atomizers. Is there a trick to doing this? Other than these issues, I like it very much; not having to top off a cartridge all day, just refilling in late afternoon.