To begin, fill a basin or sink with warm water, ensuring that it's not too hot, as extreme temperatures can damage the fibers. Next, add a small amount of baby shampoo or hair conditioner to the water. These products are designed to be gentle on fabrics, helping to clean and soften the fibers without causing further fading. For an added boost, you can also include a bit of fabric softener, which will help enhance the texture and overall feel of the garment.
Once you have prepared the soaking solution, gently submerge the faded knitted item, allowing it to soak for at least thirty minutes. This soaking process will help to lift any dirt or residue while also allowing the fibers to relax, which can improve the appearance of the fabric. After soaking, rinse the garment thoroughly in cool water to remove any remaining product, and then lay it flat to dry, reshaping it as necessary.