Cut down on the caffeine. . Ll 1 l l l If l vi' i) ttll on a spiders ability to spin webs. The last picture shows the spider on caffeine.. Two things: 1, Caffeine acts as an insecticide, and while spiders are arachnids they fall into the arthropods category which also includes insects, so its reaso Cut down on the caffeine Ll 1 l If vi' i) ttll a spiders ability to spin webs The last picture shows spider Two things: Caffeine acts as an insecticide and while are arachnids they fall into arthropods category which also includes insects so its reaso