I actually found that the red plastic area in my Patterson tank was leaking when I turned the thing upside-down. So, now, I just use the plastic agitator key to swirl the reel back and forth for 10 seconds per minute. This works great for me!
If the problem is knowing how to get the liquid to swirl, just leave that variable alone and swirl the film instead.
It is said that we remember the important things, if true, why photograph? I forget, so I photograph.