I have used clay baths several times in the past. In the beginning, the very first bath I had very many black specks left over in the tub. With each use the black spots became less.
I like the calmness the baths provide.
If I did not replenish electrolytes though I did not feel as good. But with hydration prior to and after the bath, I noticed a better sense of well being.
I will be resuming clay baths here shortly utilizing the smokers detox from the magnetic clay baths site first. Though I have not used a bath in a while, I still take clay internally as it seems to help with elemination issues.