@ursala7 First, do you call the dentist office to check to see if there has been a cancelation. I do that often each morning during the week until they say yes, we can see you.
Dry Mouth: Do you know if you sleep with your mouth open at night. Many begin to do this and it can cause dry mouth. I, as well as Scoop tape our mouths closed with 3M micropore tape a piece the size of a postage stamp, as scoop would say. It helps with the dry mouth.
Extra AirWay Clearance. Want to get all that mucus moving up and out. Actually I haven't done the extra clearance yet!!!
Hack vs Huff Cough: Be careful. The wrong type of cough isn't good for the lungs. My speech therapist said hacking is a no, no due to possible problems it would cause with the vocal cords. I wish I could describe how she told me to help get it up and moving. More or less repeat and slowly say a moderate huh, huh. Have you been referred to a Speech Therapist...a Speech Therapist has helped a couple of us on Mayo with Bronchiectasis.
Mouth/Teeth: For me I use my boiled water with salt in it. I keep a small jar in the medicine cabinet and clean/refill as needed to rinse my mouth out after brushing my teeth. I think it helps in various ways. Might be worth a try. No cavities so far, but we are all different.
Mucinex: I don't use it yet. Many do however. You know what is best for you overall and your experiences when you are or are not using it.

"Cascade into many"...would like for all good things to 'cascade' for you and all of us with the 'no fun' routine with Bronchiectasis.
Barbara