Remove dirt and dried mud from the suede surface using a kneadable eraser, emery board or nail file. If the dirt is damp, wait until it has thoroughly dried before removing.
Use a clean, dry toothbrush or suede brush to rapidly scrub the scuffed area of the suede. This will raise the nap of the suede to match the surrounding nap, alleviating the scuff.
Hold the scuffed area a few inches above the steam from a tea kettle to loosen and lift extremely matted down suede nap from a scuff. Allow the steamed area to dry, then scrub with a toothbrush.