Clean your Formica counter top off first with a clean rag and warm water. Rinse any soap or other cleaning agents off the Formica completely, as they can damage the Formica.
Use a paste of baking soda and water or an all-purpose spray cleaner to remove any stains. Abrasive cleaners, even paste cleaners, can scratch a Formica surface. If you scratch the surface, it may be impossible to restore the finish on the countertop.
Apply car wax or beeswax with a clean rag to the surface of the Formica. Use small circular motions to apply the wax, or follow the car wax manufacturer's instructions. Then buff with a separate clean, soft cloth such as a cloth diaper.
Apply a lemon oil or self-stripping wax to your Formica occasionally to maintain the finish.