A foot spa is a device that is used to relax and soothe the feet. It can be used to improve blood circulation and remove toxins. There are many different types of foot spas available, but they all have the same basic features.To use a foot spa, you will need to add water and some type of cleanser or soap. The amount of water you add will depend on the size of the foot spa. Some foot spas come with a built-in cleaning system, while others require you to clean them manually.Once the water is added, place your feet in the spa and relax for 10 to 20 minutes. You can use the spa's built-in massager to massage your feet or you can use your hands. Be sure to rinse your feet when you are finished.