Kushin kankare matattarar kayan gini ne, wanda ke matukar buƙata. Yawancin lokaci, kusoshi, sukurori, rivets, da sauransu, don tabbatar da tsaro ko gaba ɗaya baya buƙatar la'akari da tasirin zafin jiki, yanayin mara kyau ko wasu yanayin aiki masu haɗari. Kayan aiki sune na karfe, ƙarfe, baƙin ƙarfe da ƙarfe mara nauyi. Amma a lokuta na musamman, kayan saurin buƙatar buƙatar haɗuwa da yanayin mummunan lalata ko ƙarfi mai ƙarfi, akwai ƙarfe da yawa da matsanancin ƙarfin ƙarfe. Wadannan matsaloli guda shida masu zuwa yakamata a kula dasu lokacin amfani da kula da aikin hako wutsiya na wutsiya:
1. Tsarin murɗa wutsiyar wutsiyar wutsiya yana da matukar muhimmanci kuma yana buƙatar kulawa sosai. Yayin aiwatar da aikin, za a sami ragowar ƙasa daga murhun wutsiyar wutsiya. Wannan mataki shine don kurkura bayan an wanke mai tsabtar siliki.
2. Yayin aiwatar da zafin rana, yakamata a haɗe dunƙule, in ba haka ba za'a sami ƙaramin abu mai ƙwanƙwasa a cikin murhun mai.
3. Shafaffen ƙwayar phosphide zasu bayyana akan dunƙulen ƙarfi, yana nuna (aya 1) cewa binciken bai yi hankali sosai lokacin aiki ba. 4. Abubuwan da ke haifar da baƙar fata a saman ɓangarorin suna haifar da aikace-aikacen juzu'i na sinadarai, yana nuna cewa ba a yin maganin zafi kuma an cire ragowar alkaline a farfajiya.
5. Sassan daidaitattun zasu yi tsatsa a cikin rinsing, kuma ruwan da ake amfani da shi don wankewa ya kamata a canza kullun.
6. Mummunan lalacewa yana nuna cewa an yi amfani da mai ƙoshin mai tsawon lokaci, kuma yana buƙatar ƙara ko sauyawa.