To use fentanyl test strips: 1. **Prepare the Testing Area:** Choose a clean and well-lit space for testing. 2. **Handle the Strips Carefully:** Use clean hands or gloves to handle the fentanyl test strips to avoid contamination. 3. **Sample Collection:** Mix a small portion of the substance (where fentanyl presence is suspected) with water. Extract a sample for testing. 4. **Dip the Strip:** Dip the fentanyl test strip into the prepared sample for about 15 seconds, ensuring the strip is fully s