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If you used the TAP MAGIC that contains TRICHLOROETHANE (the thin watery stuff), it will not work well with hand tapping. It works great under power where enough frictional heat is generated to cause the liquid to fume off, but with hand tapping it is just a watery liquid. It is essentially dry cleaning fluid. If you put this stuff in a container and heat it, the fumes will disolve the grease off of a shop rag. We used it for years and the entire shop smelled like burned cinnamon every single day all day long. For health reasons we switched to other less toxic chemicals.