Article: Take the curtains out of the dye bath and transfer them to your washing machine (if they are not already inside the machine). Run the machine through a full hot water cycle and set the rinse cycle to warm water.  If you can set the soil level of your washing machine, set it to "heavy soil." Do not drain the dye bath if you dyed the curtains in your washing machine. Simply run the machine using the water already inside. Add 1 to 2 Tbsp (15 to 30 ml) liquid laundry detergent to the washing machine and run it on a normal to warm wash cycle with a cool rinse.  The first wash cycle should have washed away most of the excess dye. This second cycle should help set the dye. Make sure that the water runs clear by the end of your cycle. When the water runs clear, the dye is set and should no longer bleed off the material. As long as the curtains are made from a material that can go through a dryer, the simplest and quickest way to dry them will be to toss them into your drying machine and tumble dry them on low until they are dry to the touch. Alternatively, you can hang dry the curtains on a clothesline. They should air dry completely after a day or two, as long as the day is dry and the sun is bright. Most of the dye should be out of your washing machine by this point, but to avoid potential laundry mishaps, it is still a good idea to clean the washing machine by running it through another cycle. Add half a capful of liquid detergent and run the machine through a warm wash cycle with a cool water rinse. Consider putting a little bleach in the washing machine for this step, as well. At this point, your curtains should be dyed and ready to hang in place.

What is a summary?
Run the curtains through a warm wash cycle. Run them through a warm/cold cycle. Dry the curtains. Clean the washer. Hang the curtains up.