What follows represents the collaborated wisdom of my fellow experts, yvilla and Kent C, with two cents
thrown in by yours truly (but they are so gracious, they've asked me to submit it):
There
is a break in period with atomizers in this
sense - with new ones, you usually have to blow out the shipping/primer fluid which then dries them out a bit. Atomizers work best when wet, (and die when dry) - that's why they have fluid on them in the first place for shipping and storage before they're sold and used.
So, after blowing out, you have to then 'reprime' the atomizer, hopefully with some better tasting
juice than with which they were shipped ;-)
Put 2 drops, maybe even 3, (don't flood it), to kick start either a new atomizer that has been blown out, or one that you have just cleaned. Huff the ecig a bit, like trying to keep fire going on a pipe or cigar, and by the time you're into half a cart you'll be back to normal draws.
If that solves your problem, you need not read further. It provides details that you
may not need.
Not all "801" atomizers are created equal or, at least, the same. Some are 2-hole (generating more vapor some believe), some are 4-hole (easier draw), and one is 3-hole (the "golden mean?").
Different manufacturers make otherwise compatible atomizers slightly differently. For example, some are low bridge and some high bridge, as in this photo of two
901 style atomizers: the low bridge RN4075 on the left and the high bridge DSE901 on the right.
The same goes for the difference between a low bridge RN4072, BE112 and Joye302 penstyle ... and a high bridge DSE801 penstyle.
As for the cartridges, the problem comes when people mix them up - say, trying to use the cartridge made for the DSE801 on an RN4072 atomizer. The 801 cartridge is actually slightly shorter in length, so that's why it does nor work (wick) as well with an RN4072 atomizer. The filling simply doesn't reach down far enough into the mesh bridge. And conversely, trying to use the slightly longer cartridge designed for the RN4072 on a DSE801 atomizer results in a cartridge that won't fit in all the way (or stay in very well) sometimes.
Now here is my two cents (i.e., subjective personal opinion, not official expertise):
Since I always drip and don't use cartridges, I don't notice much difference among these atomizers (although I haven't tried the Joye302 yet).
The problem, from my perspective, is the battery: I don't think a skinny battery like this is powerful enough to drive this atomizer (unlike the Joye510 atty, which is driven just fine by its battery). For example, my 801 and 112 attys work great on my 5V Prodigy. And I'm betting that they'll do very well on a box mod (with a 3.7V 900 mAh 14500 battery) I plan to purchase.
But that is just speculation on my part.
To find out more, check out the
DSE 801 *Penstyle*,
RN-4072 *Penstyle*,
M-201 *Penstyle* Model Specific Discussion forums, as well as the
E-cig Technical Issues forum.