Human: How do I fix a running toilet? Assistant: 
To fix a running toilet, you'll need to first identify the problem. It could be a stuck flapper, a filled overflow tube, a worn toilet flange, or a worn fill valve. To access the fill valve, you'll need to turn off the water supply to the toilet and flush the toilet until there is no water left in the bowl. Then, unscrew the caps from the top of the fill valve, place an adjustable wrench over the nut below the cap, and unscrew it. This will allow you to replace the fill valve if needed. If the flapper is stuck, you can remove it and clean it before replacing it. If the toilet flange is worn, you may need to replace it. Once you have identified the problem, you can follow the instructions of the new part to finish the repairs.