Once the mattress and box spring are dry, encase them in sealed bed bug encasements. Encasements are crucial, as they prevent bed bugs from entering or escaping the mattress and box spring, cutting off key hiding places. Remember to leave the encasements on for at least 18 months to ensure that any bed bugs already inside have starved to death. Once the encasements have been applied, you can put your mattress and box springs back on your treated bed frame, and put your laundered bedding back on your bed.
Unlike cockroaches and flies that feed on filth, there is often no relationship between bed bugs and cleanliness. Since the bugs feed solely on blood, pristine dwellings can be as vulnerable to infestation as are places of squalor. That said, poverty and privation can lead to increased risk of bed bug problems, as can the inability to hire a professional exterminator.
Wash bedding and clothing (hot water and hot drying cycle for 30–60 minutes), vacuum cracks and crevices, and freeze articles that may have been used as hiding places for bedbugs may reduce infestation until extermination can be performed. Vacuum with special attention to cracks and crevices in furniture, equipment, walls, and floors. Vacuuming some talcum powder will reduce the chance that the bugs will crawl out of the vacuum cleaner. Dispose of the vacuum cleaner filter and bags in a tightly sealed plastic bag.
To know it's bedbugs, it's important to find the bugs themselves. Look at bedsheets and mattresses for little spots of blood, rusty-looking stains (crushed bugs), or black dots (bugs' poop). You might see live bugs around the seams or tags of mattresses and box springs, or in cracks of bed frames and other furniture. They can even hide in books, carpet edges, and electrical outlets.
While most of the bed bugs were wiped out by the chemicals, three groups continued to thrive after being treated with chlorfenapyr, and five groups were still kicking after being treated with bifenthrin. That means that while some bed bugs will respond to these chemicals, others won't—and it's likely that more and more bugs will become resistant over time.
In the case of beds, a more economical option is to encase both the mattress and box spring in a protective cover like those used for allergy relief. Encasements specifically designed to help protect against bed bugs are available through retail or pest control firms. Higher quality ones tend to be more durable and comfortable to sleep on. Once the encasement is installed and zipped shut, any bugs which happen to be inside are entombed and eventually will die. Encasements also help protect newly purchased beds, and make it easier to spot and destroy any bugs residing on the outer surface during subsequent examination. Encasements will not, however, keep bed bugs from crawling onto a bed and biting a sleeping person.