A few years back i broke my pinky on my left hand. When it healed it didn't have the same reach as it did before. So when i watched tv or a movie I would put my elbo on the arm of my chair, open my fingers in a V under my chin and rest my head with 3 fingers on one side of my chin and my pinky on the other. Sitting there my fingers would relax allowing my chin to slip deaper into the V between my fingers spreading myb\ fingers futher a part. After doing that foe a while each day I got most of my reach back,

Don't rush it or push down with your head, the more you can relax your hand the more your chin your force them a part.

Try it for three weeks, then see if your reach in creases.You can't tell if you do it daily.