Hi all!
FisherPal, you said it sounds like you're getting e liquid up when you squeeze, but sometimes it seems like an air lock. In another post you described it as "bubble locks". I totally get that. I've experienced it numerous times. Just a tad of a hassle, but I strip the VMOD down to the bone, unscrew the bottle and go at with a toothpick. It doesn't happen often, but it does happen. I don't really think it's anything you've done incorrectly. Welp, if you have, *I* have too!
And hey, I'm an old timer "experienced" VMODian. 
If/when I've had an issue with the VMOD, I just drip on the atty. Sometimes (for no reason that I can think of) it just primes it back into functionality. I don't know. I'm a vaper, not a scientist!
Another thing you mentioned... about hearing the liquid entering the chamber but still getting dry hits even after (pardon me, TB) "S"-ing? I really find that tilting the VMOD while taking a hit seems to offer the atty just the right amount of liquid. The learning curve is there, but the difficulty arises in the fact that that curve seems to be a tad different for all of us.
As far as no bubbles go, have you tilted it and given it a slight shake?
TB in a nearby state, you refuse to use the "S" word? Don't tell Tat...
Now you're talking my language! I'm a verified Bonut Master! I started making them around a year or so ago, and I must say, I found them VERY effective!
FisherPal, you said it sounds like you're getting e liquid up when you squeeze, but sometimes it seems like an air lock. In another post you described it as "bubble locks". I totally get that. I've experienced it numerous times. Just a tad of a hassle, but I strip the VMOD down to the bone, unscrew the bottle and go at with a toothpick. It doesn't happen often, but it does happen. I don't really think it's anything you've done incorrectly. Welp, if you have, *I* have too!
If/when I've had an issue with the VMOD, I just drip on the atty. Sometimes (for no reason that I can think of) it just primes it back into functionality. I don't know. I'm a vaper, not a scientist!
Another thing you mentioned... about hearing the liquid entering the chamber but still getting dry hits even after (pardon me, TB) "S"-ing? I really find that tilting the VMOD while taking a hit seems to offer the atty just the right amount of liquid. The learning curve is there, but the difficulty arises in the fact that that curve seems to be a tad different for all of us.
As far as no bubbles go, have you tilted it and given it a slight shake?
TB in a nearby state, you refuse to use the "S" word? Don't tell Tat...
Interesting suggestion here which I'm going to try real soon. I'm sure you've heard of 'Bonuts'? I would say that when the juice is 'injected' into the atty, it will stand a better chance of staying there on top of the coil, along the same lines as a carto, but without that 'carto-ish' (?) flavor diminish. Worth a try.
Now you're talking my language! I'm a verified Bonut Master! I started making them around a year or so ago, and I must say, I found them VERY effective!