Keeping your lawnmower clean can make a big difference in its efficiency and lifespan. Regular cleaning will not only prevent build-up, corrosion and diminished performance of your mower, but it can also minimize the spread of lawn diseases. Rust prevention is key as well, as wet grass will trap moisture in the underside of your mower and create prime conditions for rust buildup on your mower deck (the blade housing on the underside of your mower), blades and blade shaft, reducing performance.