To maintain your extinguisher, follow a few easy steps:

- Inspect the extinguisher monthly to make sure it's still fully charged. If the gauge reads low, recharge it (if it can be) or replace it.
- Shake the extinguisher to keep the dry powder from settling.
- Do not test your extinguisher. It will loss pressure, making it worthless when you need to use it.
- Discard the extinguisher if it's been dropped, damaged, dented, or corroded.