i got some pretty dirty[as in soiled] chips today and was experimenting with different ways to clean them. tried a product called "simple green" and it worked really great. it comes in a spray bottle and i used a soft bristle toothbrush and could clean a chip in seconds. it is a non-abrasive, biodegradeable degreaser and very economical. i used it full strength today but it can be diluted and might work as well that way. just thought i'd post this and see if anyone else had ever tried it.
doug