Hygiene at a third of the city's black spots has not improved despite stepped-up government cleanup efforts in the past few weeks, inspections by a political party have found. Of 153 places earmarked as hygiene black spots by residents, 47 were as dirty as they had been when first identified three weeks ago, the Democratic Alliance for the Betterment of Hong Kong reported. Improvements were least noticeable in Sham Shui Po and Yuen Long, where 70 per cent of the 17 identified spots had not been cleaned up, legislator Ip Kwok-him said. The dirtiest district was Yau Tsim Mong, where 15 of 46 spots had not improved. Mr Ip said he was worried that people would become complacent because swine flu appeared to be weaker than anticipated. He will raise the issue in the Legislative Council on Wednesday. In the past three weeks, about 1,000 DAB volunteers inspected hygiene black spots at least once a week. They relayed their findings to the Food and Environmental Hygiene Department. Mr Ip said it was difficult to clean up private property. 'Some alleys are privately owned and the responsibility of cleaning lies with the owners. If they shy away from their responsibilities, the government must go through a complicated process to clean the area.' The party urged the government to allocate more resources to district councils so they could help clean buildings that lacked management bodies. The government should also organise cleaning competitions in residential buildings, it said. A department spokeswoman said it had noted the black spots identified by the DAB and would follow up on the issue. The government earmarked 106 hygiene black spots to be cleaned up in the face of a possible swine flu pandemic in the city. Some of these spots overlapped with those that residents had identified to the DAB.