This method doesn't involve much inconvenience to pedestrians but has not won the favor of building managers as it costs nearly three times as much as the water wash. Professional cleaners involved in such office tower work must meet certain strict conditions.
這種方法沒有淋濕路人的顧慮，但卻普遍不受各大樓負責人的歡迎，原因是乾洗費用較水洗貴將近三倍價錢。大樓外牆清潔公司規模較大至於安全上的顧慮，趙老闆表示，控制升降的馬達和鋼纜都經過嚴密的檢查，確定正常和安全後，才展開工作。