While getting my salmon boat ready to fish, I decided to take a closer look at my dry chemical fire extinguisher. First thing I noticed was a mud dauber had plugged the nozzle. While working to clear that out, I noticed the chemical agent wanted to hang onto the bottom of the extinguisher. It took a good 3 or 4 minutes of shaking to loozen it from the bottom of the cylinder. I have my doubts the thing would have worked properly during an emergency. Just a heads up safety item.