Sample failures can occur at various stages, including initial quality control (QC) and laboratory analysis. Failures can occur due to insufficient sample volume, contamination, damage, bacterial growth, or discoloration. Labs often run multiple checks before declaring a sample as a failure.
If a sample is deemed a failure, you will be notified either through the app or by your coach. Here are the subsequent steps:

Replacement Kit: A replacement kit will be sent to you to recollect the sample and submit it to the lab.
Recollection: During the replacement process, it's crucial to ensure that you follow the sample collection instructions correctly while recollecting the sample to prevent further failures.

By following these steps, you can address sample collection failures and ensure the accuracy of your analysis. Your coach will guide you through the process and provide the necessary support.