1. Temperature Indicator Not Changing
- Possible Causes: The sample might be too cold (i.e., not from a fresh urine sample) or the indicator strip may be defective.
- Troubleshooting: Ensure the sample is given promptly and check for any damage to the temperature strip. If the strip remains unchanged within a few minutes, discard the test cup and use a new one.
2. Results Reading Time Exceeded
- Possible Causes: If the test is read too late (well after 5 minutes), results might become invalid or inaccurate.
- Troubleshooting: Use a timer to ensure you interpret results at exactly 5 minutes. If you’ve passed the recommended window, retest with a fresh cup.
3. Faint Test Lines or No Control Line
- Possible Causes: Insufficient sample volume, expired product, or improper testing technique can cause faint lines or a missing control line.
- Troubleshooting: Verify that you’re using unexpired cups, collect an adequate urine sample (following instructions), and confirm the control line appears before interpreting the test line. If the control line doesn’t show, the test is invalid; use a new cup and retest.