Files should always be protected from grease, water, or nicks that can make them less effective. When carrying files in a toolbox, it is a good idea to wrap them in a cloth. When storing, try to hang them in a rack or keep them in a drawer with wooden divisions. Keep file teeth clean by using a file card or a wire brush to clear the grooves.
At the start of the season, add fresh gas and new engine oil to your snowthrower. Check the machine’s auger and impeller and make sure that the air filter and spark plugs are clean. At the end of the season, drain the gas and oil from the engine and clean the machine before storing it.