Ngaphambi kokusetshenziswa, bheka ikepisi lokuhlinza ukuze uqinisekise isimo sokuphepha futhi ikakhulukazi ukuthi isesimweni esiphelele, ihlanzekile futhi ayilimele.Uma isivalo sokuhlinza singaphelele (umonakalo obonakalayo njengokungaguquki, amakhefu, ama-smudges)