1. Itha kupachikidwa pa kumira, choyenera maofesi osungirako matawulo, kuyeretsa mipira ndi zinthu zina khitchini 2. Mapangidwe osinthika, khalani ndi thanzi ndipo pewani kukula kwa bakiteriya 3. Zinthu zapamwamba komanso zotsika mtengo zotsika mtengo