I have a 10mo dd and have just discovered a flea on her. I have no pets and have been in my home for 1 year so I don't think it's from a previous tenant. We don't come into contact with animals on a regular basis so have no idea how fleas have gotten into my home or how to make sure there are no more. Due to the age of my dd I cannot use any sort of chemical on my carpets as she crawls everywhere and is learning to walk. Any help will be appreciated.