Not sure what you're referring to...but will assume you mean from the 5th wheel in the truck bed.
If this is the case just use a flat Spackle knife and scrape off the old grease. Then do the same to the king pin plate on the trailer. When you apply new grease do it sparingly, as you don't need very much. Apply it to the trailer king pin plate only...this way when you couple the unit the trailer plate won't scrape the grease off the 5th wheel and drop it into your truck bed