Yog tias koj kov cov pos nrog koj txhais tes, nws yog qhov tseeb tias nws tau qhuav lawm. Yog tias koj kov nws nrog koj cov ntiv tes, nws yuav tawg, thiab yog tias cov tshuaj yej qia tawg, nws yuav pom tseeb dua. Tom qab ntawd saib nws cov xim, yog tias cov xim tsis sib xws, uas yog, qhov nkhaus kuj yog grey-dawb, ces qhov ziab kom tiav. Yog tias nws yog mos thiab tsis khaus, cov ntsiab lus dej yuav tsum siab. Yog tias nws tau txheeb xyuas mechanically, cov ntsiab lus dej yuav tsum tau meej dua. Hais txog qhov hnyav ntawm lub cev thiab cov pob txha, koj tuaj yeem sib piv ntawm koj txhais tes. Raws li kev txheeb xyuas ntawm cov phaj qis, koj tuaj yeem nyeem cov ntawv hauv qab ntawm cov tshuaj yej phaj los yog ci nrog lub sieve, los yog xaiv cov tshuaj yej ntsuab stalks kom sib npaug. Raws li kev txheeb xyuas lub hauv paus chiv keeb, nws yog ib qho tsim nyog yuav tsum tau soj ntsuam cov duab, xim, tsw, xim dej, thiab hauv qab ntawm nplooj kom meej, thiab xyuam xim rau nws cov yam ntxwv yam tsis muaj kev paub tshwj xeeb.
