Slow cooker baked ( steamed?) potato

Wrap some washed potatoes in aluminum foil, enough to fill your crock pot ,and set on high for 3 - 4 hours or low 6 - 8 hours. I cooked 2 sweet potatoes and 6 white and cooked for 3 1/2 hours on high. The sweet potato were very soft and the white ones  were perfectly cooked.