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Message: <blockquote data-quote="Former member 99816" data-source="post: 989344">There is nothing to fear from CO2 except that if you touch it with bare skin it will cause a serious freeze burn. Also, though it might cost only  $1 or $2 a pound at the grocery store, you can't buy just a pound.CO2 is an extremely effective insecticide against bugs in grain. According to USA Emergency Supply: "dry ice takes as little as 10% carbon dioxide concentration over a period of a month or so to kill insects. The higher the concentration, the faster it kills them, reducing this time to hours rather than weeks at near 100% concentrations."Based on my reading, I would suggest dumping all your gear into a trash can along with a pound of dry ice.  Then put a garbage bag over the top and pull it down the sides, leaving it loose at the bottom. The dry ice will evaporate and since CO2 is heavier than air, it will fill the trash can from the bottom, pushing the old air up and out.  This will yield near 100% concentration of CO2 and kill all insects in a few hours.And, though I'm speculating here, it will be a painful death.</blockquote>