Cobweb Stickers Clip Art
Cobwebs, incorporated into the fireplace's molding, provide a resting spot for long-legged critters.
Source: Martha Stewart Living, Volume 143 October 2005
Self-adhesive computer paper
Print out the cobweb labels on self-adhesive computer paper. Affix to the molding of the fireplace or any other place in the household where spiders might lurk.