Ahh good old dog poop in the shoe... story of my life! We have a sizable yard, and no matter how hard I try to keep it picked up, my foot always manages to find the one turd I missed- grrrr. I'm laughing though at all of the responses from the expert poop cleanin' mamas out there!! It cracks me up.
I've used nearly all of these methods. Although, the designated wire bristle brush is a new one for me! Will have to try that :)
In the winter in Chicago, I let it dry then clap the shoes together, and whatever's left I get out with a small twig or stick. In the summer, I try to wipe the bulk of it off in the grass and then I jet spray it with the hose and blast it out. Gross stuff.
Anyway, good luck :)