Install the Drain Cup. Remove the rod holder and fit the bottom with a rod-holder-base drain cup. These molded vinyl cups come in 2-inch and 2 3/4-inch diameters to fit small and large tubes, and each ...

Spray the cup holders generously with your cleaning solution, covering the bottom and all sides. Leave the solution to soak for a couple of minutes to loosen the sticky grime on the cup holders.