The built in pump has not worked yet. I have the clear plastic drain tube inserted per the instructions, and it is secured.  When I press the pump button on top of the unit, nothing happens, and the light does not illuminate.  I've had to empty the container by hand so far.  Was I shipped a unit with a defective pump out of the box?  Is anyone else having this problem?  If I had known the pump wasn't going to work, I would have saved some money and bought the unit without the pump.