I have a heavy infested house full of fleas....I hired an exterminator Friday the 5th to get rid of the fleas and they are still there! Is there anything else I can do to get rid of them? I have tried borax and the flea bombers and nothing is working. I heard you can put mothballs in the vacuum bag to kill the adult fleas that hatch inside the bag or that you suck up...does this really work? Is it even safe...I keep hearing mixed opinions. I also heard that after vacuuming you can wrap the vacuum bag in another plastic bag and place it in the freezer to kill all of the existing fleas. Does this method work? Please let me know asap!! I am deperate for any help...They keep biting me and leaving opened wounds on my skin. Any help will do. Thank you!