It's almost impossible because they get in all the nooks and crannies of your house such as under the siding, around windows, etc. A non toxic way to kill them, if you can get it to them, would be to use detergent mixed with water in a hose end sprayer. I hope this helps.
I use Dawn dishwashing liquid detergent and water, mixed about the same as you would to do dishes or a little stronger, and put in a 2 gallon spray bottle. Pump up the pressure and spray directly on the bugs. It works! Ralph