This is our third Cuisinart On Demand Unit.  We love it and glad that we bought another.  However, this model has the visible water tank and it maintains a mist after rinsing unless I remove the water lid.  I guess it is due to the dampness of the carbon filter.  I worry that the dampness/mist will create possible mildew.  Our previous units did not display the water tank.  Happy too that it has a cleaning reminder.