1. Raws li kev tsim kho tshiab ntawm silicone roj hmab cov khoom lag luam, kev ua haujlwm ntau dua, ua haujlwm zoo, txhim kho cov khoom zoo thiab lwm yam zoo (rau silicone roj hmab, kho vajtse, yas, xov tooj ntawm tes, thiab lwm yam).
2.Peb pawg ntawm 6-theem tu cov txheej txheem, tuaj yeem ua ke dawb, muaj feem xyuam rau ntau yam kev xav tau ntawm cov neeg siv khoom.