I use plants that are free of any spots or bugs.cut it up and wash in the sink with a little dish soap. Rinse very well. Place in crock pot with water on low like about 200 and steep don't boil! For 2 days until water is dark. I use the stalk the most because that's where the medicine is. Then strain the juice after 2 days and cool. Put into ice cubes and it will keep for one year. Then put one or two cubes in tea when needed for pain. Works great for me!