Here is an article regarding a recall of Kidde Fire Extinguishers due to  blocked nozzles. Although this is a US article, some of these extinguishers (ULC listed) have been found in Canada. We ask that a thorough inspection of any of these Kidde Brand extinguishers be completed before placing into service, or during the annual maintenance to remove any of defective hoses.
Also, it would be appreciated if you could submit any finding of these faulty hoses so we can decide if further action is needed in Canada.