There is a very easy and old time trick to get rid of them. Get diatamacous earth. You can get food grade that won't harm humans or pets. You can get it from the farm stores like rural king. Spread it around your legs of your bed put it on the cracks of your bed and etc. Within a few days they will be dead. They get the powder on them and it shreds them open and they bleed to death. They also take it back to there buddies since they trample through it. It's what the pest control people will never tell you because it would put them out of business. It cost around $20 for a bag compared to paying $1,500 for heat treatment.