NO.4 Qeda Ishidi

 Isiphetho esingunombolo 4 sihlala siyindlela yokuzikhethela ezintweni zikagesi zasekhishini, izindawo zokudla neziphuzo, amakheshi, izitebhisi ezizihambelayo, izibhedlela, nanoma iyiphi indawo lapho insimbi engagqwali ingase ihlangane nokudla. Ibonakala ngamamaki ayo amafushane, wokupholisha aqondile, lesi siphetho sibuye sibe lula kakhulu ukuhlala sibukeka sisihle ngokuhamba kwesikhathi. Kuye ngokuthi insimbi izosetshenziswa kanjani, igrit yokugcina yokupholisha ingaba kusuka ku-120 kuya ku-320—izinombolo zegrit ephakeme zikhiqiza imihuzuko emihle kanye nokubukeka okucwebezelayo. Kungakhathalekile ukuthi i-grit, umphumela uba indawo okumaholo kwayo ngokuvamile angeqi ku-Ra 25 µin, okwenza kube kokubili okuhlanzekile nokunokunakekelwa okuphansi.