The Skimmer Swabbie offered by AvastMarine.com is a great way to keep the neck of the collection cup clean. A motor rotates a squeegee within the riser, as often as a timer allows. I've been using the Skimmer Swabbie for about two years. A few months ago, the motor stopped and I ordered a replacement. Fortunately, my tank sitter came over and helped get it swapped out because it was on my To Do list. A few weeks later, it was making strange noises so I called up Justin at Avast ...