Step 1: Fill and Chill
This picture shows Dawn being used, I don't know if other soaps will work in the same way.
Some other things that I didn't state that were brought to my attention:
1. Original website WiseBread.com (For those who asked. The picture is from there too, I hope this doesn't offend anyone).
2. The reason you use dishsoap is that it will get cold and still flex around joints and such.