Best Brown Recluse murderer!?

I want them all to die and never come back. BROWN Recluse SPIDERS seems to have taken over my storage. Can't even go in there without fear of being bitten. I hv researched Demon WP and Delta Dust.. don't know which is better. If u know of something even better please let.me know which. I have nice things in storage I need to get to.. SPIDERS SAY NO!!! I want to say YES!