Dry Vapour steam machines are proven to kill and control bed bugs. The huge advantage of using steam is that it will kill all bed bug stages including eggs (most insecticides are non-ovicidal). A United States study (Meek 2003) showed that combining steam and insecticides provided better long-term control than insecticides alone.
• As concentrated steam is composed only of heated water, some people prefer steam treatment alone for mattresses and bedding.
• Bed bugs are sensitive to heat. They die rapidly when exposed to temperatures over 45 degrees Celsius. But the heat must be applied quickly, as a slow rise in temperature will cause bugs to disperse and possibly spread an infestation.
• A suitable steam machine must produce steam of a low vapour and high temperature.
• Steam flow rate must be kept to a minimum.