Blast dust from your combine’s filter with the Filter Blaster from Salmon River Innovations, Spencer, Iowa. The Filter Blaster is designed to quickly clean air filters used in large machinery like combines, tractors and trucks. Frequent cleaning during use will improve fuel efficiency and increase the life of the filter. Dennis Grieve who invented the Blaster says a filter may be cleaned up to 20 times. The Blaster is available as a shop model where the dust collects in a shop vac or a portable model used in the field. A source of compressed air is needed to operate the Blaster. Cost of the device starts at $349. For more information, call 855/341-4677 or visit www.airfilterblaster.com.