There are a few things you can do to clean an icy bottom. First, try using a plunger to suction onto the ice and pull. This will help remove any excess water and ice from the area. Second, use a vacuum cleaner with the hose attachment to suck up any water and ice that has built up on the surface of the bottom. Finally, use a bucket or other container filled with warm water and pour it over the area to help clean it out.