Water in the tube from the humidifier?

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If your humidifier is heated you might try adjusting the temperature as you may be getting condensation in the tube. 

Red

Happens to me all the time during the winter months it is the worst. You can get a fabric wrap to go around the tubing if turning the setting down doesn't help. 

Try placing your machine on the floor, that why condensation will run down to the humidifier.

Panda I had the same problem with the water getting into my tube.  when I asked about it at the Drs office I was told it was because Id filled the H2o level in the holfing tank just a bit over.  When filling it try to keep the levels just below the fill line, and it did help.  I haent had a problem with it since.  Goof Luck......Fire

I'm new to the cpap and I noticed it doing this as I was getting ready to use it. I had filled it a little to high so I dumped out some of the water in the tank, and havent had a problem since.

You are experiencing what they call rain out. If you place your machine lower than your bed that should resolve the problem