May I ask how exactly you attempted to use steam? The last bow I made adjustments to I had to just steam the handle. I got the wood good and hot and then clamped it in a form that forced the limbs the direction I wanted, but left the handle clear. I then wrapped a wet rag around the handle for about 10 minutes. After that I placed a 500w shop light about 12" away from the wood. I would turn it every 15 minutes, let it fully cool, reapply the rag, then more heat. After four passes I washed the wood thoroughly with alcohol to help pull moisture out and oiled it up. After setting for about a week I removed the clamp and got the near 2" of adjustment I needed.