Thank you both for your replies.

Brian: slowly is the only way I can put water down the tube to flush it without throwing up, so I'm ok with that. That nauseated feeling remains, though, even with that slow pour, and the fact that there's always something hanging around in the tube when I look at it creeps me out. They didn't really give me anything about the cleaning of the tube, other than to tell me to flush it once a day if I'm not actually using it (which I am doing), but I can see from this morning's flush that there are things adhering to the sides of the tube near the base. I'm not sure what I can do about buildup like that if there's always something in the tube. Any advice would be welcome from anyone with experience.

Gail, thanks for the recommendations. The Mucinex would do wonders for me, I think, so I'll ask about that this morning at the RO along with something beyond compazine for nausea (do they make antinausea patches like they do pain meds? that would be a bonus). The Reglan might help with my something in the tube issue I mentioned above...

Cheers to all, and thanks again.