Ndapota ratidza zvinhu izvi sechinhu chinogona kunwiwa nomunhu pasina ngozi kana kuti chimwe chinhu icho munhu anofanira kudzivisa kunwa: mafuta enjini, tii, mvura inotonhorera, doro, guruva rakanyunguduka, mvura inopenya, mukaka wemombe wakaomeswa, uye mushonga wokuwachisa.
Zvinhu zvakachengeteka kunwa tii, doro, mvura inopisa, uye mukaka. Hazvina kuchengeteka kunwa mafuta enjini, mvura inotonhorera, marasha akanyunguduka, uye mushonga wokuwachisa mbatya.