Store properly – Your knife should not be kept in a sheath, keep in dry location.
Hand wash – Dishwashing causes abrasions to the blade and can deteriorate the handles quickly.
Rust happens – When corrosion occurs you can use a fine grit (600-800 grain) sandpaper to buff it out.
Oil your knife – You can use any food grade oil such as olive oil or grapeseed oil.
Use correctly – Surfaces matter, use wood or plastics for the best results.
Dry thoroughly – Water creates oxidization and it can happen rapidly.