1. Nws nyob ntawm qhov xwm txheej. Yog tias siv cov khaub ncaws tiv thaiv kev kho mob pov tseg, nws tsis tuaj yeem ntxuav tau vim nws tuaj yeem hnav tau yooj yim thiab poob nws txoj kev tiv thaiv. Txawm li cas los xij, yog tias nws yog qhov zoo, nws tuaj yeem ntxuav tau, tab sis kev saib xyuas yuav tsum tau them nyiaj rau kev ntxuav.
2. Txoj kev ntxuav cov khaub ncaws tiv thaiv kev kho mob: Tom qab siv, maj mam so tawm cov stains ntawm cov khaub ncaws txhuas nrog dej sov thiab cov tshuaj ntxuav tes kom zoo raws sijhawm. Nws yog txwv tsis pub siv cawv, tshuaj dawb, muaj zog acid thiab alkali detergents los ntxuav khaub ncaws. Lub tshuab ntxhua khaub ncaws lossis ziab qhuav ntawm cov khaub ncaws txhuas yog nruj me ntsis txwv tsis pub, thiab kev siv tshuaj tua kab mob siab thiab kub siab ntawm cov khaub ncaws txhuas yog nruj me ntsis txwv.