5. Uncover the yarn and let it sit in the oven (or other relatively warm place) with the heat set on low and the oven door open (if you don’t want the oven to heat the room, turn it off and close it to keep the yarn warm). The application of heat is to help the fibers take up the color of the tea better, so the more slowly the yarn dries, the better. Mine was still quite damp after 4 1/2 hours. If you’re leaving the oven on, check the yarn every 45 minutes to make sure it’s not drying out—you don’t want to burn it, just keep it warm.
6. Next, let cool uncovered at room temperature. Hang to dry, then rinse thoroughly until the water runs clear. Hang to dry again, and your yarn will be ready for use.