Toilets often leak due to two main reasons: poor waterproofing and pipe leaks. To locate the leak, follow these two steps: 1. Turn off the main water valve and conduct a pressure test to identify or rule out pipe leaks. 2. If the pipe pressure is normal and there are no leak signs, consider whether the waterproofing was not done properly. Specific actions: turn off the power and water gates, use a flashlight to inspect the issue, then close the water valve to eliminate unrelated disturbances, and then turn it back on to pinpoint the leak. If an anomaly is found in the corresponding bathroom on the inspection floor, communicate with the owner to further determine the leak location. If communication fails, contact the property management for leak detection. While we can often judge the leak location ourselves, it's crucial not to take matters into our own hands. Unprofessional actions can potentially worsen the situation.