Hi H....it's D.! We use DFW Pest Control. Don't think it is organic, but it is not a spray and is baby and pet safe. They put different powder mixes in the wall depending on what types of bugs you have. Even different mixes for different types of ants or spiders and we have had several! They have a one year program where they come out on request at any time for "free". It is called Wall and Void Treatment. They also spray outside the perimeter of the house 4 times per year. They have yard programs and several other things as well.
We tend to get lots of creepy crawlies living accross from the park. Theirwebsite is dfwpest.com. The kids havenot had any problems and the bugs are gone immendiately. We just renewed for the second year.
D.