cleaning cats

[cowboys302]

Does anyone know of any tricks to clean a catfish up real quick? I can do 5 in a half-hour, which isn't terrible, but I'm used to just zippin' through bass and trout, so I was wondering why I'm having such difficulty with the cats. I heard about the trick to break their backs and peel the head back, taking the skin with it. I can't get it to work right though. What am I doing wrong?