Reddit mentions of Nike 704674 Free 5.0 TR Fit 5 Womens Training Shoes - Black/Black/Black - 8

Any advice for removing an awful, awful smell from sneakers? I've had these for about a year, and I've tried every trick and every product and there's still a residual smell that won't come out. I've scrubbed them with vinegar and baking soda, used 3 different products made for removing smells from sneakers, aired them out for days outside in the sun, put them in the freezer for several days, and they still stink. Never had this issue before and I'm stumped at this point. My last resort is putting them through the washer, which I think might ruin them, but at this point they are kind of ruined for me anyway.