Joyes are about the only attys I purchase, in quantity, any more. But I still get "special" or "fancy" ones and IKV 510s for DH @ ~ 1.7 ohm, as the bulk Joye 510 @ 1.5 ohm are a little hot for DH. Just got in several boxes from VK, for emergency stash. I won't clean them until I break into a box. Right now we have plenty of previously used attys, that have been cleaned, that aren't too tired to get thrown into the emergency. We have some 510 Joye, in the emergency box, that started rotation in 2010. They do get tired after so much use; many months in rotation. The ones that are extremely tired I've chucked.
Most 306 are either IKV or Cisco. I did purchase a bunch, off classies, that included other non-Cisco or non-IKV, along with IKV and Cisco. They were used but as close to new enough, and cleaned by seller, well enough, they appeared brand spanking new.
I'm especially "sensitive" to any taste other than the juice. I have always, and still do, boil ALL attys before using them; 5 minutes very low rolling water (just barely boiling instead of hard rolling boil - hard rolling can potentially make the bottom of pan much higher temp than soft boil) Let dry, for a bit, and then do a very careful dry-burn. I'm a master dry-burner (no brag - just fact) and I've only popped one in 1.5 years. That was an almost new IKV LR 306, on first cleaning after initial use (yes, it had the before use boiling, as all the others get). I pushed the pulsing dry-burn beyond my 20 second rule. That is 20 seconds plusing, rest, 20 second pulsing, rest, etc., unil there is no vapor and/or smell coming out. Pulsing is coil just firing up and then release firing button.
I've started throwing them into a sealed container of "fat" grain rice to speed up the drying, after they cool and blowing them out, before doing the dry-burning.
I'll sometimes push the 510s a little harder and do about a 1-2 seconds on, tail end of each pulsing cycle, if they continue to produce a lot of vapor at end of pulsing cycle. I don't do that with the LR 306 or similar. I learned my lesson.
I, also, put plenty of desiccant packets in the storage bins to keep the moisture at bay.
I, also, used to boil all cartos that were boilable. In 2010 there were still a lot of cartos, especially CE2, that had a lot of "primer" and what I suspect to be soldering residue. I don't boil cartos any more or do any precleaning as the ones we get don't need it. Those are IKV Fusions, SmokeTech, Boge, and SmokeTech Resurectors. There is no room or desire for CE2, in our "stable", any more.
DO NOT dry burn any stuffing carto for sure. Learned my lesson, long ago, on first box, cheap ones thank goodness.
Feisty Alice