1. Tom qab siv lub ntsuas dej ntse rau lub sijhawm ntev, nws yuav muaj plua plav ntau dhau ntawm nws qhov chaw. Yog tias nws tsis tau ntxuav kom raws sijhawm, nws yooj yim kom muaj plua plav ntau ntxiv. Tom qab cov hmoov av muaj zog heev, nws yog qhov nyuaj heev los ntxuav nws. Yog tias qhov xwm txheej hnyav, nws yuav ncaj qha ua rau qhov yuam kev ntawm qhov ntsuas dej.
2. Kev saib xyuas tsis tu ncua kuj tseem ceeb thaum siv cov ntsuas dej ntse. Tom qab qhov saum npoo ntawm lub ntsuas dej tau stained nrog cov kua qaub thiab alkali stains, nws yuav tsum tau so kom huv si raws sijhawm, txwv tsis pub cov kua qaub thiab alkali cov khoom muaj feem yuav ua rau corrosion ntawm lub ntsuas dej. Tau kawg, lub ntsuas dej kuj yuav tsum tau tiv thaiv los ntawm kev ya raws, txwv tsis pub yuav muaj kev nyeem ntawv yuam kev, yog li thaum muaj dej stains, lawv yuav tsum tau so qhuav.
3. Cov ntsuas dej ntse yog tag nrho cov teeb tsa ntawm cov kav dej, yog li txawm tias nws yog rau lub hom phiaj ntawm cov ntsuas dej ntse lossis cov kav dej, cov khoom hnyav tsis tuaj yeem muab tso rau ntawm lub ntsuas dej, txwv tsis pub nws yuav ua rau muaj kev puas tsuaj. Yog tias muaj kev cuam tshuam tsis zoo rau lub ntsuas dej ntse, tsis txhob disassemble nws randomly, tab sis hu rau cov neeg ua haujlwm tom qab muag kom muaj lub luag haujlwm.
