Wow I never knew that. I don't think I've used my propane grill all summer and we don't lack any spiders hanging out around the outside. If I grill my turkey this year I'll have to be careful sparking it up. The spider situation has deceased a bit the last couple years after coaxing some crickets back into play around here . I've read that spiders eat crickets and are drawn to them by their chirping...at least that's what someone told me when I told them a couple years back I went out and bought some crickets. They said crickets will just attract spiders. I was sure hoping they were right as the crickets seems to be out back further in the wooded area whereas then the spiders would be going out there instead of hanging all over the house somewhere.