<human>:  How can I fix a running toilet?
<bot>: The first step to fixing a running toilet is to identify the cause. If it is due to a worn flapper valve, you can replace the flapper valve. You may also need to check the toilet fill valve, or the float in the tank, to ensure it is properly set and not allowing too much water to refill the tank. Additionally, check to make sure the toilet fill tube is not clogged or kinked. If all of these components are in order and the toilet is still running, you may need to make adjustments to the toilet fill valve or replace it entirely.