The ideal temperature for a bath is between 95 and 100 degrees. The best way to test the water is not with your hand but with your wrist, one of the most sensitive parts of your body.
We use aromatherapy baths at the hotel—lavender is a good scent to soothe and relax if you've had a long week; eucalyptus is great after a workout or for respiratory relief.
Shut the door, dim the lights, and take out the good towels. A 15- to 30-minute soak is ideal. After that, your skin starts wrinkling and the bath gets cold.