Hi I have never thought of your idea and quite honest it's kind of funny but if it works for you Great! I do own a wood stretcher and they worked great for me, my stretchers are adjustable, basically you put them inside the shoes and opened them up little by little until your desire. HTH
Honey I've never even tried it before! Lol as I googled ways to stretch a shoe I've stumbled across a few blogs stating how it worked. Thought I was brave enough to do it, but as someone mentioned that it may not turn out to be a positive result I immediately took them out. Now I have a damp shoe with hopes of a brighter day.