[Koha] how to remove z39.50 results

Hi, I've recently installed koha for use with my personal library. After testing it, I found the z39.50 search option and tested it out. After a couple of trial and errors, I was able to get it to connect to the library of congress and got the data. After the data has been edited and posted, I end up with the search results cluttering up the Z39.50 Search Tool. The question is: how can I clean up the Search Tool page? Thanks. God bless. William