Soaking in a hot bath before going to bed about 1 hour to increase the temperature in the body, and then allowed to cool, which signals the body to feel that it is time to sleep and then.
Warm water before going to bed about one hour to raise the temperature in the body, then let it cool down. Which signals the body that it's time to sleep.
In warm water before going to bed about 1 hours. To increase in body temperature and then leave to cool down. Which is a signal to the body feel bedtime.