I have lived in my house since 2007. I have a large crawlspace (dirt floor, ranging in height) where I have a nice woodworking shop.
In 2011 the shop became infested with fleas, but not the upstairs. Two rounds of flea bombs got rid of them but they came back this year. There is no food or water source for them in the crawlspace.
I imagine that another round or two of flea bombs would get rid of them this time too. Is there any way of getting rid of them permanently? As there is no food or water source for them this seems doable, but I can't think of how.