Trash them. Spend money on good shoes. Sell something.
I had a pair of shoes that shrank on me because I left them wet and in the sun(my old crocs), and wore them anyways at the sushi bar. 65-70hours a week I was standing in those things, just a bit too tight. I got used to it, and liked that they didn't slip around so much, but they didn't support well.
The result? An ingrown toenail!
Which came with a complimentary Staph infection!
Which didn't get killed by 3 types of antibiotics!
And it kept me from being able to run for almost 3 years!
And I SERIOUSLY ALMOST LOST MY FOOT 5 MONTHS AGO. You see, Staph spreads to the bone eventually, and I was missing hunks of bones in my feet.
I paid a good quality podiatrist, and after a few months, I have no problems, and no toenail on that foot.
All because I didn't want to drop a C note on some shoes.
Buy. Better. Shoes.