Gilashin da aka rufe waɗanda ba a daɗe da amfani da su ba sau da yawa ba za a iya buɗe su ba.Babban dalilin rashin iya buɗewakwalban filastikshine cewa karfin iska na waje ya fi karfin iska na ciki.Idan kuna son buɗe murfin, dole ne ku daidaita matsi na yanayi a ciki da wajen tankin ajiya.

 
1. Yi amfani da wukake masu kaifi da makamantansu, a hankali a buɗe tare da gefen hular kwalbar don kiyaye ma'aunin yanayi na ciki da na waje, sannan a buɗe;2. Yi amfani da bakin karfe, cokali na tagulla, maɓalli, nannade tawul ɗin takarda don ƙara juzu'i, sannan a dasa hular kwalbar a gefen bakin kwalbar don barin iska ta shiga cikin gwangwani, sannan buɗe shi;3. A yi amfani da wuka mai kaifi ko makamancin haka wajen huda huda a cikin murfi don sakin iska, kuma ana iya bude karfin iska a ciki da wajen kwalbar.4. Yi amfani da shi a gida Mai busar da gashi mai zafi yana maimaita zafi da hular kwalban daga nesa zuwa kusa, kuma a ƙarshe za ku iya buɗe iyawar iska;5. Juya kwandon iska zuwa kusurwa 45-digiri, sannan ku riƙe gwangwanin iska, danna ƙasan gwangwani, murfin zai buɗe.Ka'idar ita ce ba da tulun motsi, an dakatar da kwalban da aka hatimi, kuma ɓangaren murfin zai ci gaba da motsawa saboda rashin aiki, kuma hanya ita ce hanya daga murfin, don haka zai zama sako-sako.A daya bangaren kuma, saboda an dade da rufe kwalbar, murfin kwalbar da aka rufe yana da wuya a cire saboda karfin intermolecular, kuma bugun murfin kuma yana da tasirin karya karfin intermolecular;6. Sai ki jika kwalbar da aka rufe a cikin tukunyar, sannan a yi amfani da 80 Zazzage shi da ruwan zafi na tsawon rabin minti (lura cewa lokacin dumama kada ya yi tsayi sosai), ko kuma za ku iya zuba murfin da ruwan zafi na 'yan mintoci kaɗan. sannan a ja murfi da karfi ya bude.