I bought a really nice pair of Sofft shoes a couple of years ago. They are very pretty and comfy, but I can't wear them. For some reason the inside smells like dog crap! I kind of noticed it when I bought them, but it wasn't highly noticeable. When I started wearing them the smell would get worse. They literally smell like shit. I've tried putting baking soda in there to get the smell out, but no luck.
They are so pretty and they are collecting dust, but I just can't seem to get rid of them.
Well if you feel invested in the shoes maybe take them to a good shoe repair place and ask their advice. They may be able to replace some of the offending components, have access to stronger chemicals, or have some other tricks up their sleeves.