Kev saib xyuas kom zoo thiab kev saib xyuas cov tais diav yog qhov tseem ceeb. Cov hauv qab no yog qee cov lus qhia rau kev tswj koj lub cutlery:
Ntxuav cov tais diav tam sim ntawd; tsis txhob cia nws ntxuav tsis tu ncua rau lub sijhawm ntev.
Tsis txhob siv cov khoom siv hlau los txhuam los yog txiav tawm cov khoom siv hlau, vim qhov no tuaj yeem khawb qhov chaw.
Tsis txhob tso cov tais diav rau lub teeb hnyav, thiab tiv thaiv kom tsis txhob raug tshav ntuj ncaj qha kom tsis txhob deformation.
Tsis txhob siv dej kub ntau dhau los yog txhuam txhuam los ntxuav cov tais diav, vim qhov no yuav cuam tshuam rau cov khoom siv saum npoo av.
