Huh, I had the same scratchy thing recently. I can say that bombing really worked great in my house, just don't forget to take care about pets and plants/ As for the yard area I recommend checking this article where is a section about some folk methods of getting rid of fleas. Personally, I have tested lavender and tree oil decoctions, as well as wormwood one. SImply wash everything with diluted water and voila. Also, you may spread pinewood sawdust around your house.