Fuskar Guano tana da siffofi biyu: ɗaya shine walƙiyar da ta faru sakamakon tarin saman insulator. Duk da haka, saboda tsuntsaye suna raba su da sassa da yawa ta hanyar laima mai insulator, yuwuwar walƙiyar kai tsaye ba ta da yawa. Ɗayan kuma shine zamewar guano a kusa da waje, tsakiya kai tsaye yana haifar da fitar da gajeren zango tsakanin kayan aikin zinariya na sama da na ƙasa, kuma babu alamun guano da suka rage akan sueco, wanda kuma shine babban nau'in walƙiyar guano. Dangane da nasarar kwaikwayon yanayin walƙiyar da tsuntsayen insulator ke fuskanta, sashen injiniyan lantarki na jami'ar Tsinghua ya yi nazarin tsarin walƙiyar da yanayin walƙiyar guano, kuma ya kammala da cewa lokacin faɗuwar guano yana lalata rarraba filin lantarki a kusa da insulator, yana haifar da lalacewar gibin iska na tashar guano a babban ƙarshen rufi, don haka yana haifar da walƙiyar insulator. Idan aka ɗauki misalin suozi na roba mai girman 110 kv, kewaye mai diamita na 55cm ya kamata a kare shi ta hanyar fantian. A lokaci guda, yi la'akari da cewa iska guano za ta faɗi kamar parabola. A zahiri, yankin da ke kan hasumiyar za a ɗauke shi a matsayin mabuɗin rigakafin tsuntsaye a cikin kewayon 30-45° tare da igiyar rufi a matsayin wurin tushe da kuma kusurwar da ke tsakanin ɓangarorin biyu. Na biyu, ƙayar tsuntsu don tabbatar da wani yawanta, tsuntsayen "sun toshe" gaba ɗaya a wajen yankin kariya.

A fannin aikin injiniya, saboda nau'in hasumiya mai sarkakiya, wasu muhimman wurare na kariya ga tsuntsaye na iya kasancewa a baya, wanda ke haifar da faruwar kurakurai marasa kyau na lalacewar tsuntsaye. Tsuntsun yana hawa sama da abin rufe fuska na wayar matakai uku da aka sanya a wurin, amma ba a sanya ƙayar tsuntsu a kan sandar ƙasa a sama da wayar gefe ba, wanda hakan ke barin matsala ta ɓoye don faruwar laifin.