Laundry detergent/cold water will work to kill bed bugs on "contact". In fact, you don't even need laundry detergent. You can use simple dish soap in a diluted mixture. It will immediately kill bed bugs on contact, but it will not kill bed bugs that it did not come in contact with. Perhaps the misinformation about all this is that simple.
Frequent Washing and Drying Can Kill Bed Bugs And Eggs Washing and drying your clothes and linens in hot water is an effective way to prevent and kill bed bugs and their eggs. It's also important to wash and dry any other washable fabrics in your home, including items like couch covers.
Bedbugs survive cold, but not for too long. Cold can kill a bedbug, but only after days. Joelle F. Olson of the University of Minnesota Twin Cities and colleagues froze bedbugs at various stages of life, fed and unfed, for varying lengths of time. The bad news was that the bugs didn't die nearly as quickly as other studies had found,
If your bed bug problem occurs in the middle of winter, you can use freezing temperatures to kill bed bugs, as well. Wrap each infested item in plastic bag material. Sit it in a shaded area on the coldest winter day possible. Note that this method will take longer than sitting your furnishing out in the sun.
Freezing Bed Bugs in Freezing Winters? Not Likely As the winter grows colder across the country, we have been getting more and more customers and callers asking if they could leave their infested items (like clothing and furniture) out in the cold weather to kill bed bugs hiding in them.
With freezers, it may not be possible to attain the extremely low temperatures required to kill bed bugs. Therefore, at The Bed Bug Inspectors, we use a more sophisticated freezing technique to control bedbugs. "What kills bed bugs are the extremely cold temperatures which can only be attained through the use of a freezer."