Prime Minister Narendra Modi today launched a stinging attack on the Congress over corruption, likening the party to termites, and exhorted the people to wipe them out by handing over a three-fourths majority to the BJP in the November 9 Himachal Pradesh Assembly elections. "If you clean just on the surface, termites come back after a few days. The Congress party's depraved mentality is like termites. You cannot just change the government and expect to be done with it, you have to take them out from the roots. Only then we can free Himachal of this disease," he said.