For the LakeMat, the easiest way is to move it through the water. Or, you can use a push broom or a squeegee to sweep it off right in the lake. MuckMats are usually left in a place where you want to walk. Many owners put sand on them so they usually don’t need cleaning. Sweeping off a MuckMat is the simplest way to clean it. But anything that moves water, like underwater pumps, or even a garden hose (with enough pressure) will blow the sediment off.