What do these instructions mean?

Kay so for science fair to use these bacterial growth strips on surfaces it states: "or, for surfaces, add deionized/distilled water and swab. " ( a href="http://www.testing-kits.com/detail.asp?PRODUCT_ID=ITS-481195" rel="nofollow"http://www.testing-kits.com/detail.asp?P…/a ) what does it mean? put distilled water on the test strip then swipe subject? or put distilled water on the subject and swab them with the strip? its the procedure so it needs to be exact