Most shoe manufacturers discourage machine washing sneakers. Detergents and the machine's agitation may damage many leathers and adhesives. But then, there are still some that can take machine washing. The key to successful sneaker cleaning is in the shoe itself.
First, see if there are care instructions inside your shoe. If so, follow those instructions. If not, use a specially designated cleaning kit for athletic shoes. Kits are most effective on leather and nylon uppers, foam midsoles and liners and inserts. When in doubt, follow the kit instructions.
Want an unconventional solution for cleaning canvas sneakers? Try shaving cream.* Some folks swear it as an effective cleaner for canvas athletic shoes. Either cover your shoes with the cream,leave it on until dry, then brush off witha soft, clean brush. Or cover your shoes with the cream and remove with a damp cloth, then let dry naturally. Make sure you check with your sneaker manufacturer before trying this.
Some people also polish, protect and condition their shoes on an ongoing basis. Look for paste or liquid polish, water repellents and leather lotions (for your specific type of shoe) from your shoe manufacturer.
Sometimes you don't need to clean your sneakers as much as you need to refresh them. Try placing a sheet of fabric softener in each shoe overnight or a spray fabric softener in the fabric soles to clean away odors caused by germs, mold and mildew and to keep them fresh and new smelling.
Most manufacturers offer very specific cleaning instructions for every style they make, so, if you want to be sure check out the brand's Web site for more information.