Over the past three years of competition my teams have been told that “Canned Air” like that sold as a computer electronics cleaner is illegal and should result in a disqualification. Recently at the U.S. Open there were multiple teams using it field side then going right back into competition. Then I heard someone say it was legal at the pit area, but not the fields. On further check of the forum I can’t see a ruling either way. Is “Canned Air” legal at the field and at the pits?