Food, dogs, gardening, books.
Erm - vinegar?(Wild guess, based solely on the fact that vinegar seems to do a good job with most everything in my house...)
It would be a much larger scale, but he could always do what I did when I was given a disgustingly filthy pasta maker. I took it apart and cleaned each part thoroughly with lightly soapy water and a toothbrush. I took a photo each time I took a part off in case I forgot how to put it back together.It probably has a lot of greasy fatty stuff coating the inside of it, so vinegar alone may not cut it.
Thanks for the ideas! I wish I could just take it to the auto place and have them dip the whole thing (they do that, you know). But engine-cleaning solvents probably aren't food-grade.Taking pictures is a great idea, Tim!