Hi Cheryl, Welcome to SMF!
I recently did some Cod smoking and had a stall occur, which is very unusual for fish in my experiences. But in trying to attain the IT (Internal Temperature), I just let it run... and run.... and run... and to me, ruin. LOL! But it was my first attempt at Cod. (May be my last, too.) :confused: Oh, it tastes OK now. But awfully dry. My final judge is my little dog, and he loves it.
On chicken, my wife and I have one of those Air Fryer machines, and we love what it does. But she does not like smoked food. So as an experiment, I had 8 chicken thighs with the skin on. I smoked 4, for 2 hours, with Hickory. (I like the flavor of Hickory).
I did her chicken while mine was smoking. Her's came out just the way she likes it, done a crispy skin. Perfect, and why we like the machine.
Then I did my 4 smoked pieces. Aside from being a tad darker from the smoke treatment, mine came out perfect, too. Done, crispy skinned, with a wonderful smoked flavor. ;)
I wasn't going for 'done' in the smoker. Just smoked flavor. So used the one-two punch to get both.
How you get the IT isn't as important as THAT you get the IT.
So keep trying. Try a bit of smoking, then finish in a way you know you like. (Roasted, fried, etc.)
There is no shame in doing steps to get your results.
If I try smoking Cod again, I won't try and do it all in the smoker, but smoke it, then finish another way. Right now I'm trying Sous Vide.
And I might be able to save my smoked Cod by infusing moisture back into it with a little lemon juice, vacuum bagging, and Sous Vide to get it back. But it just an idea at this point. :)