Kev thaiv cov kav dej hauv tsev yog ib qho teeb meem tshwm sim heev. Piv txwv li, cov kav dej ntawm cov ntxhua khaub ncaws thiab cov dab dej hauv chav ua noj yog qhov tshwj xeeb tshaj yog ua rau txhaws. Nov yog qee qhov ua rau cov kav dej thaiv. Washbasin : Qee tus neeg nyiam yaug lub mop ncaj qha rau hauv lub tais ntxhua khaub ncaws, uas tsis muaj tseeb. Thaum koj mop hauv pem teb, koj yuav tsum nquag pom qee cov plaub hau. Cov plaub hau no yuav ntws ncaj qha mus rau hauv cov yeeb nkab dej thaum yaug lub mop, uas yuav ua rau txhaws tom qab ntev. Lwm qhov laj thawj yog vim li cas qee tus poj niam ntxuav lawv cov plaub hau ncaj qha rau hauv lub tshuab ntxhua khaub ncaws, Qhov no tuaj yeem ncaj qha ua rau muaj qhov thaiv ntawm lub tshuab ntxhua khaub ncaws. Zaub dab dej : Qhov chaw uas cov zaub dab dej feem ntau yuav raug thaiv, vim qee cov zaub seem, los yog cov seem seem ntawm txhuam cov tais diav yuav ncaj qha thaiv cov kav dej.
