Your input — is nebulizing only once a day okay?

I nebulize every morning, and after 2-3 hours the mucus wants to come up and I do AWC. I always get the same amount approx 1/8 cup of clear mucus with 10-12 small light yellow plugs. When I also neb in the late afternoon or evening nothing comes up , but I cough at night which wakes me up and only a tiny bit of clear mucus comes up. It doesn't seem worth it to me to neb twice a day, as I don't clear any mucus , and it keeps me up at night coughing a bit even when I neb in late afternoon instead of evening. I have stable bronch and MAC, not on antibiotics.
Any opinions?

Does anyone else only nebulize once a day?