Not working. First time i sprayed it around my room which is very small it killed small bugs but after week later i see millipede crawling around my room again. you may spray it every couple day so 12 months of effect is just a lie.
I sprayed this around the perimeter of my house both outside and inside every month or after it rains. I also sprayed this directly on spiders and centipedes- they died instantly. However, I noticed that I can buy the bigger version of this near the same price at Lowe's.