There are three types of cockroaches most common in Utah: German Cockroach, American Cockroach, and Oriental Cockroach. Cockroaches are extremely hard to eliminate. This is not a one-time treatment, this is at least a weekly treatment until they are no longer an issue. If you find one cockroach, you can count on there being more. Roach feces can cause allergic reactions and asthma in children and adults, they are most active at night. They are incredibly good at hiding, spending over 75% of their life in cracks and crevices. Misapplication of commonly used insecticides, including over-the-counter ones, are usually ineffective at killing roaches and, if not treated properly, could actually make things worse.