Kathmandu, Nov 28: Prime Minister Sushila Karki has said that unnecessary poll spending and undue influence to the voters should be controlled adding that 'clean candidates' should win the election.During a meeting with the Chairman of Nepal Pariwar Dal, Eak Nath Dhakal, at the Office of the Prime Minister on Friday, PM Karki said that the upcoming election to the House of Representatives (HoR) should be different than those of the past.