Does the paint on your palette has a tendency to bead up? This can be frustrating if your trying to get colors to mix. This tip may be just for you! With a soft cloth gently clean the mixing area of your palette with a mild abrasive liquid cleanser (Soft Scrub, Liquid Scrub) or Baking Soda mixed with a little water to make a paste. Be careful not to leave any residue of the cleanser behind.
This works on new or old palettes, plastic or metal.