I used the Walker Audio silver based contact enhanser for a long time and did try that by Mapleshade's product also. Goo Be Gone, which is orange based also works. But it is really Audiotop Connect 3 that think is best. This oil is the last step in Audiotop Connect Workstation that includes an acid and a base cleaner as first steps. I have found that the cleaners get nothing off gold plated contacts and so seldom bother.
Now with the High Fidelity CT-1 Ultimate cables with Stabilant 22 on them, I don't use the Audiotop on those cables.