Okuqukethwe kwama-cartridges kufanele kuhlolwe njalo, futhi akufanele kusetshenziswe lapho kukhona ama-clots, ama-flakes noma esimweni sokunamathela kwezinhlayiya eziqinile ezimhlophe ezansi noma odongeni lwegobolondo, kuyinika ukuqeda kwe-matte.