Knife cleaning: safe to do without soap?
Knife Skills Illustrated: A User's Manual suggests that knives can be cleaned with hot running water alone. "With sufficiently hot water, soap should not be necessary." Is this safe? What if I am only cutting vegetables? What if I am also cutting raw meat?
Best Answer
In order to "Sanitize" any surface you must wash that surface (in this case, knife blades) with water at no less than 190°F (~88°C) according to the (U.S.A) National Sanitation Foundation (NSF). Earlier this year the Conference for Food Protection recommended reducing that standard to 160°F (~71°C) as an "energy saving measure" citing a study at Ohio University that claims that it is equally effective. Additionally they recommended that the temperature could be reduced to 120°F (~49°C) with 'chemical additives' (soap).
So the question is "How hot is your hot running water?" According to "Wikipedia" (a dubious source at times, but I will accept it for this point) suggests that most home water heaters produce water at 104°F (~40°C) to 120°F (~49°C). This would suggest that to sanitize a knife blade something more than 'hot running water' is necessary. In fact since water over 131°F (~55°C) puts you at risk for scalding (Wikipedia, Ibid) and you certainly don't want a water heater putting out water that hot, I would have to disagree with your source and conclude that in household use soap is required to sanitize your knife blade.
note: in order to qualify my answer to the question of "safe", I have elevated the standard from "clean" to "sanitized", certainly you may 'clean' a knife with running water but that level of clean is not what I would consider 'safe'.
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Quick Answer about "Knife cleaning: safe to do without soap?"
Regardless of safety (=killing bacteria), water cannot dissolve fat, while soapy water can. If you don't use soap, your knives will stay greasy, smearing old rancid fat on anything new you cut with them. Note that the book does not say "avoid" or "do not use" soap. It says soap "should not be necessary".Should you use soap on knives?
Wash your knives by hand.The very best way to clean a high-quality chef's knife is to wash it by hand with plain old soap and water.What is the safest way to wash a knife?
Wash your knife with dish soap and hot water after each use. Rinse with clear water. Air-dry or pat dry with clean paper towels. Handle kitchen knives carefully by their handles; don't pile them into the sink or dishpan, but wash them one by one and rack them with handles up.What do you clean a knife blade with?
To clean serrated blades, use an old toothbrush rather than a sponge. If there's junk stuck on the blade, pour dish detergent right on the spot and let it sit for a few minutes before scrubbing again. Rinse the blade with warm water and dry with a clean cloth.How do you disinfect a knife?
How to Properly Clean \u0026 Store Your Kitchen Knives
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