Like OP says, try some menthol type
juice. This has always worked in a pinch for me.
If you are really just trying to get some nicotine, OR you are just satisfying the hand-to-mouth habit, OR you are just wanting to exhale vapor, I have found having some unflavored
e-liquid on hand is a good solution.
Bit cheaper than wasting your better juices.
The switching up juices throughout the day thing really has helped me avoid vaper's tongue since I first learned of these particular methods. I typically have my KFL loaded with a different
juice each day, then a mod/dripper or two setup with me at all times with various selection of juices.
Also like the OP said, don't go back to cigarettes. The last line about what I carry with me, above, is my all out preventative measure against picking up another analog. The last time I picked up an analog was because I needed a cotton change in my go-to at the time RBA and I did not have the time to do so. So I bought a pack. Power in numbers for me these days as far as numbers of PVs I carry!
Hope this helps!