1. Isivinini sokupholisa ngokushesha.Ukudla okuphekiwe okupholile kuze kufike ku-10 ℃ kudinga kuphela ama-20-30, ukudla okubhakiwe kupholiswe phansi ku-20℃ phakathi kwe-10-20min.
2. Ukupholisa umfaniswano.Ngaphansi kwesimo se-vacuum, ukudla kupholiswe kusuka enkabeni kuya phezulu.