Why is the Nippon Liquid not killing the ants?
Part of the reason for the lack of success in controlling ants invading your home may be the lack of frequency when changing the liquid. Nippon Ant Killer liquid should be replaced at least once daily, as if left for more than 24 hours the liquid becomes hard and looses its attraction. It is a good sign if the ants are swarming around the Nippon Liquid as the more ants taking the liquid, the sooner a fatal dose will build up within the colony.