What insecticide do you guys use around your CW if you do it yoursef? In the bays, around the exterior of the building, around lights, etc… I’d like to get something that doesn’t stain or streak Extrutech wall panels or panted block but also leaves a residual so it lasts for more than a few weeks. I’m having a terrible time with spiders spinning webs and right now the horse flies are ferocious!