I am using double thick blue pads in an effort to correct the sound of internal dripping on metal. Very annoying. The double pads made my home cooler. For a day, the sound of dripping-on-metal was gone, but has now returned.
The cooler does not leak or overflow.
Also, when I shut down the system it makes a medium loud buzzing sound for 30-60 seconds, then stops. This sound is not present during the operation of the cooler.