Ukuhlolwa kwezinga lokugcwalisa kuyindlela ebalulekile yokulawula ikhwalithi engahlola ukuphakama koketshezi ngaphakathi kwesitsha ngesikhathi sokusebenza kokugcwalisa.Lo mshini uhlinzeka ngokutholwa kwezinga lomkhiqizo kanye nokwenqatshwa kweziqukathi ezingagcwalisiwe noma ezigcwele ngokweqile nge-PET, ithini noma ibhodlela lengilazi.