Ugg makes a special cleaner for removing salt stains from suede. However, you can make your own inexpensively and can safely clean the boots. You will need a soft toothbrush to gently dislodge any debris from the boots before you begin. Dissolve 1/2 tsp. of Dawn dish detergent in one cup of warm water, gently blot the solution onto the boots using a clean cloth rag. Repeat gently blotting until the stain disappears.