Then, once a week for a period of several weeks, make 25 passes over the carpet within four feet of the main entrances, 16 passes over areas with heavy foot traffic, and 8 passes over the remainder of the carpeted areas.
कई हफ्तों तक, हफ्ते में एक बार दरवाज़े के अंदर चार फुट के दायरे में 25 दफा वैक्यूम क्लीनर से सफाई कीजिए ।