I cannot communicate with my data logger.

The Optic and Tidbit data loggers must be inserted into the Base Station in order for the computer to detect them; it will not detect the Base Station alone. Check to make sure that the coupler is positioned properly and the magnet end is closest to the data logger, not the Base Station or the Optic Shuttle. It is important to keep the Optics and Tidbits free from obstructions such as dirt and algae. Do not use any chemicals to clean the data loggers. Clean the Optics with warm water and mild dish detergent. If the build-up is not removable with dish detergent, you may use toothpaste and a soft cloth as a mild abrasive cleaning agent.