I was at a brew pub in Ouray Co a few years back. It was over run with flies. The wait staff had these Bug-a-Salt guns. They worked great, but there was salt al over the tables and floors. I'd be up for seeing a pneumatic vortex design!Have you heard of Bug-a-Salt guns? They're spring-loaded, pump action shotguns that shoot a spray of table salt to very effectively kill flies & other annoying, flying bugs!
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