Here is a question submitted by Lynda:
What is the easiest way to clean dried, caked-on dog poopout from between the grooves of my Nike shoes?
Here is a question near and dear to my heart 🙂 since I have a dog and a backyard I have direct experience with this problem. What I do is use a pointy tool like a nut pryer(used to get the small pieces of broken nuts out of nut shells) or a small screwdriver. It gets in the groves well and will with a little patience get most of it. I also clap the shoes together (outside) as I am working and the poop works free. For a final cleanup I get up early and walk my dog across a grassy field and the morning dew does the rest. Oh the things we do for our pets! I hope that helps and good luck.
I just had an idea that will sound ugly but might work. Put your shoes in a plastic bag. put them in the freezer. When the poo is ice frozen you can bend the shoe in different direction and the poo will break and fall out like ice cubes. (maybe use several plastic bags)