There are no magic sprays that kill bed bugs very well. Most commercial insecticides will kill bed bugs if applied carefully and directly to the insects and their hiding places. An exception is "Bug bombs", or aerosol foggers. Foggers are mostly ineffective in controlling bed bugs.
The best thing to kill bed bugs is to go against them with full force. Unfortunately sheer willpower is not enough, you need to armor yourself with steamers, mattress and pillow encasements, sprays and glue straps.
Kill bed bugs with heat, but be very careful. Raising the indoor temperature with the thermostat or space heaters won't do the job. Special equipment and very high temperatures are necessary for successful heat treatment. Black plastic bags in the sun might work to kill bed bugs in luggage or small items, if the contents become hot enough.
1 in 5 Americans either has had bed bugs, or knows someone who has. And the problem isn't going away. It's actually getting a lot worse. Hosted by: Michael Aranda ----- Support SciShow by
Heat can effectively kill both bed bugs and their eggs. Steam mops are a great way to kill both bed bugs and their eggs, and as a bonus, they can also serve various other cleaning roles around the house. Source
Before we give you a list of things that kill bed bugs instantly, we must give you the caveat. Many chemical agents that kill bed bugs instantly or on contact, if applied incorrectly or without a bigger plan to locate and control the whole infestation, could create a bigger problem.