$0.50. Jar: free. Wood shavings: free. Creepy feeling induced
in trick-or-treaters: Priceless.
white film fixer (sodium thiosulfate) was left in uncovered jar
in the garage and forgotten about for several weeks. Roaches,
for some reason, were attracted to it, climed in, and died. It
was discovered during Halloween setup and promptly added to the
lab table. For safety, the solution in the jar pictured is water.