Ekupheleni kweshifu ngayinye, noma ulungiselela ukuphrinta, qiniseka ukuthi wonke amarola kayinki emithombo akhishwe futhi ahlanzwa kahle. Lapho wenza izinguquko emshinini wokunyathelisa, qiniseka ukuthi zonke izingxenye ziyasebenza nokuthi awukho umsebenzi odingekayo ukuze ulungise umshini wokunyathelisa. Izingxenye ngazinye zesistimu yokulungisa ziklanywe futhi zenziwa ukuze zikwazi ukubekezelela okuqinile futhi zisebenza ngokuguquguqukayo nangokushelela. Uma kwenzeka okuthile okungavamile, iyunithi yokunyathelisa kufanele ihlolwe ngokucophelela ukuze kutholwe ukuthi yini ebangele ukwehluleka ukuze kwenziwe ukulungiswa okufanele.