The message “invalid” result when testing for coccidia/strongyloides eggs is because the Micron Kit cannot generate a result at that moment. This is usually due to problems with the video quality (e.g. darkness, blurriness).
There may be a problem with the camera focus (making it difficult to detect smaller oocysts/eggs, such as those found in coccidia and/or strongyloides infections).
In this document you can find an overview of possible causes of an invalid test result and what you can do in such situation to solve this. Next, we have made a video which provides an additional explanation.
For cleaning the internal lens, please follow this protocol.