If your 'Fireflies' have been working, and suddenly stop, the problem is likely one of the two following problems:
- The solar panel has not been receiving enough DIRECT SUNLIGHT to keep the batteries fully charged. To fix the problem, turn the switch to the OFF position, place the solar panel where it will receive 8 hours of DIRECT SUNLIGHT in order to get the batteries fully recharged again.
- The battery contacts and battery ends have become dirty or corroded due to moisture. Remove the batteries and clean both ends with a clean cloth. If you see any residue, rub it off using a pencil eraser. Also be sure to clean the metal contacts in the battery holder so they are shiny. You can use a pencil eraser for this as well.
NOTE: Always try to place the solar panel assembly where the water sprinkler is not shooting water up underneath the unit.