7Cold
In addition to the heat, bed bugs would also be killed at low temperatures below 0 degree Fahrenheit or minus 18 degrees Celsius for at least four days. During this time, the cold would penetrate all crevices and cracks to kill the insects and their eggs. For smaller items, you can put them in airtight plastic bags and then throw them into a freezer. If you have a spacious freezer, consider doing this for larger and bulkier objects. Compared to the heat method, this option might take more time to achieve the expected results. [7]
