@thumperguy Hi Don – Celebrate the clear stuff!
Just had this discussion with my new pulmonologist yesterday. I always thought that, like with sinus drainage, clear mucus was "go", yellow was "caution" – pay attention to your breathing, lungs, general health and green/brown/bloody was "stop" – figure out what's going on. She liked that way of assessing, and was happy to hear my mucus has changed from yellow to clear on the Big 3 (18 months) and 7% saline. She pushed me to be more stringent about using the saline at least daily (I tend to slack off when I feel good) – she would prefer twice.
Another thing, if you are introducing saline or other meds via neb, you are diluting the mucus so much that even if it has a slight color, it is likely less noticeable.