I found ~30 baby spiders scattered across my bathroom ceiling/venturing into the adjacent room after coming home from a weekend trip. I vacuumed those up and sprayed the 2 rooms with pesticide. I’m worried about what to do next because I haven’t found the nest anywhere and online pictures seem to imply there should be many more spiders.
My best guess is that they came from a vent on the ceiling, because they’ve all been on the ceiling so far and its been many months since I’ve used the HVAC. I think I might just wipe all of the vent covers down with the pesticide… How worried should I be? Is there anything else I could do to keep them from spreading into my home? My partner is against harsh chemicals so I’m trying to avoid dousing the entire home.
Most of the spiders will have eaten each other.
If you see them spreading into your living spaces, you can spray them with isopropyl alcohol for a quick clean up. If they’re staying out of your living areas, they’re the last defense you’ve got against real pests. Spiders, being apex predators, tend to be well spaced out except at hatching time. I usually transport my house spiders outside somewhere sheltered when they start looking fat, so they won’t lay their eggs inside. A few make it back in to patrol the inside of my walls, and eventually the cycle repeats.