The Geraniol 600 in Essentria IC3 Insecticide Concentrate causes the strong lingering odor.
Essentria IC3 Insecticide Concentrate is labeled to control mealybugs and can be used in greenhouses as directed on the product label.
Essentria IC3 Insecticide Concentrate is not labeled to treat or repel snakes. Please take a look at our guide on How to Keep Snakes Away and the snake repellents we offer.
Essentria IC3 Insecticide Concentrate is not labeled for termite control. While it would likely kill termites that you sprayed with it directly, this product is not for use for termite prevention or to treat existing infestations. If you are looking for a greener product for subterranean termite control, you may consider Altriset which is the first EPA reduced-risk termiticide. You could also use a termite baiting system instead of doing a soil treatment.
Unfortunately, you are past the time to treat your home for cluster flies. Cluster flies enter your home in the late fall, early winter, usually around late September/early October. The flies enter through cracks around windows and doors and under siding. As the weather warms up or as your heat kicks on, the flys will emerge. Most will go outside but some will be confused and end up in the house. Next year, you should treat the outside of your home earlier in the year to prevent entry. For now, you can spray the inside of the home to help kill flys that are still in the wall. If you spray baseboards, window sills, etc you will kill the flies as they come out. As far as the flies that are in the house already, I would suggest our CB PCO Fogger with Pyrethrin. It should kill any that are flying around in the room you set the bomb off in. Be sure to read all directions and vacate the property for a few hours after setting it off.