Reply by Enoelf

If you are adamant about removing the spiders from the shop, you can wage an effective battle against them with a shopvac. Knocking the webs down is a complete lesson in futility, however, the vacuuming of the webs complete with spiders will physically remove them from the area without the introduction of questionable chemicals. I don’t particularly like spiders, and will sweep errant ones up as I move about the shop, but have never considered insectile genocide. As long as they remain out of my way, they can live their lives munching on the really annoying insects.

-- Central Ohio, Still got 9 and 15/16 fingers!