Talk:Tips and Tricks/@comment-14.194.98.151-20120317154614/@comment-4102115-20120317163352

You answered your own question - the laws of nature in a singular reality dictate that only one referrer can be the first person to refer you - which as you noted is what the friend code under the Services tab is for. So don't go to the Services tab, click on the Friends tab instead. Also, just using the referrer code does not add them as a friend so you still can't clean their island unless you add them as a Friend under the Friends tab.

For detailed information on adding friends to clean, see the relevant Cleaning page.