My Rena XP2 is way too loud. When I first set it up is was whisper quiet (4 days). Then I opened it up to put some Matrix in it for the cycle I was about to start, closed it, plugged it in and it has been loud ever since. I followed all of the directions. Air must be coming in from somewhere. Whenever I shake the filter bubbles spew out of the outlet. The noise is a loud humming noise combined with a water trickling noise. To make matters worse it is in my bedroom! What do you think the problem is?
