Okokuqala, ukwakheka kwayo okuwusizo kuqinisekisa ukuthi izinkuni zakho zihlala zihle futhi zifinyeleleka kalula. I-fire crack yangaphakathi inikeza indawo ezinikele yokugcina izinkuni, ukuqeda isidingo sezinqwaba eziphilayo noma izingodo ezihlakazekile endaweni yakho yokuhlala. Lokhu akugcini nje ngokuthuthukisa ukubonakala okuphelele kwendawo yakho yasendlini kodwa futhi kwenza kube lula kakhulu ukuthatha izinkuni noma nini lapho usidinga. Okwesibili, h