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In regards to sanitation, as the others have mentioned before me, you can't do wrong by treating it like a kitchen knife...
For cleaning sticky residues (tape gunk, sap, etc...) any number of common products can be employed, such as WD-40, lighter fluid, rubbing alcohol or nail polish remover.
Heh, I was more referring to the potential "utility" work that the OP was suggesting the knife might get used for.You sure have a strange diet Fascion!
I think the OP should stick with soap & water or the pants leg swipe, he did say that he wanted it for food prep. No point ingesting kerosene, naphtha, methanol or acetone.
Wipe it on your pant leg and you're good to go.
Do you use knives for food prep in the kitchen? Do you clean them?
Do the same thing.