The more extreme method of flea extermination is using a professional. You can hire an exterminator to use a flea fogger in your house but that is a lot of chemical residue to leave in your living space. It is recommended that foggers only be used in extreme cases for that reason.
Anyone that has ever had to deal with fleas in their homes will probably tell you that they considered using flea sprays in order to get rid of the flea infestation. These are actually very effective but there are some things that you need to keep in mind when you are using them so that your family and your pets will not be harmed in the process.