Now I'm not suggesting you do this but it worked for a very expensive pair of lace up half boots I bought 15 years ago. I could never get them broken in or stretched so they were comfortable. So I soaked them in the tub overnight. Yep. Then I put 2 pairs of socks on and wore them to work for the day. I also walked to work. I had a couple extra pairs of socks to change during the day. Anyway, it worked they stretched out perfectly and I can wear them anytime now. I also treated them with neatsfoot oil after the soaking and wearing as well.Good ideas. Need to try that