Wopatsa thukuta nthawi zambiri amagwira ntchito pophatikizana ndi zinthu zotenthetsera, monga mawaya owonda, osungunuka, nthito za kaboni, mu nsalu ya swea sweade. Zinthu zotenthetsera izi zimayendetsedwa ndi mabatire obwezeretsedwanso, ndipo amatha kukhazikitsidwa ndi kusintha kapena kuwongolera kutalikitsa. Zojambula zamtunduwu nthawi zambiri zimaphatikizaponso izi: