Steaming will only kill bed bugs that are exposed to the heat, so any bed bugs that haven't come into contact with the steam will survive. Therefore, the procedure may have to be repeated a couple of times to make sure that all the bugs have been eliminated.
Fortunately, bed bugs have one true weakness: heat. As resilient as they seem, all it takes to kill them is exposure to a steam temperature of at least 120°F / 48°C (the higher the better). This is why Dupray steam cleaners are your best option to exterminate bed bugs, as they produce lethal high temperature steam.
No surface is left untouched during steaming. Bed bugs are not discriminative they hang around anywhere to prey on human blood. Hardwood, tiles, marble, fabric and laminate are all worked on by the bed bug steamer to kill bed bugs in carpet, window sills and skirting. Using it is simple and quick.
Repeat the process 2 to 3 times to ensure that all the bed bugs are dead. It often takes 2 or 3 times for steaming to kill all of the bed bugs since they may move to escape the steam, or you might miss an area. Plan to repeat the steam treatment a few hours later or the following day.
It's true you can rent a steam cleaner and get a lot of the bedbugs, but there is no steam cleaner for bedbugs that gets rid of them all because they hide out in great numbers, travel great distances to feed and their eggs are so small they stick to the fibers in the carpet and the cracks in fabrics.
Steamers are very good for getting into certain areas and killing the bugs and their eggs when used properly, but there are some places that the steamers cannot be used. With an infestation, all bugs must be killed or else they will just propagate again from wherever they were not eradicated.