Moisture in neb tubing

My normal routine is to replace my tubing once a month For rest of neb kit I do soapy wash and sterilize using Dr. Brown's microwave steam sterilizing bags after each use. About a week after setting up the Pari neb kit (it comes with my 3.5% HyperSal) the beginning of this month, I happen to notice moisture bubbles in the line. I've been doing neb for four years and this was something I might have seen rarely so I just ran the compressor to clear the line. When it kept happening I did a close visual of the tube all the way back to the compressor and found about a 8-10" of the line with a large concentration of moisture--not just some drops. We all know where bacteria like to grow. Urg. No amount of running the compressor cleared it up. Yesterday I called the Pari folks to ask if they had any feed back on such a problem. All she could suggest was letting the compressor run or hanging it to let it air dry. So...I thanked her, hung up and threw the tubing in the garbage. I had ordered some other kits and had lots of extra tubing and just put on a new one. This was so scary because I have MAC and pseudomonas A. and currently on Tobramycin. You can bet I'll be checking any tubing very carefully from now on--even if brand new.
The best to everyone.