Hot Shot Ultra Liquid Roach Bait kills roaches and the eggs they carry. How it works: Roaches enter the home in search of water and are most often found near water sources (i.e.: kitchen and bathroom). This is because a roach can live for up to a month without food, but can only survive seven days without water. This bait is extremely attractive to roaches because it combines an attractive food source with the water source they need, delivering a lethal dose quickly.