I do it all the time too. You do med good light and a good ripper and some patience. there is a magic thread that if you find it, the seam will simply pull off.

so first you rip out the double stitched seam and then you have to take out the seam that attaches the elastic and then sew it back. I simply sew two rows of stitched to mimic the original look.

I'll do it for you if you send them to me.