Clear search before user enters search criteria

I have a Grid with an Advanced Search that has many fields. Most are set in Search Criteria with first option of Empty Content, a few with Not Empty Content. Currently, I have to tell the users to press Clear/Clean at the start of every search, otherwise they always get No Records Found. If they Clear/Clean then they can enter their criteria and get expected results. I want to find a way to always Clear/Clean the Search before they enter their criteria, or maybe set the first options to something that will not filter anything. That way they won’t have to click Clear/Clean every time. Would much appreciate any ideas.