We recommend dusting your cabinets frequently with a soft lint-free cloth.  For more thorough cleaning we recommend using Guardsman products.  They can be found at many stores (Wal-Mart, Bed Bath & Beyond, most local hardware stores etc...).  If you should have a spill it needs to be cleaned immediately.  Use a clean damp cloth and wipe dry right away.  Never use harsh abrasives such as steel wool and soap pads on your cabinets, as they will mar the finish.