Poke a toothpick into the tip (arrow shown in the picture) of a sugar snap pea.
Move the toothpick upward to pull the string out of the pod.
Move the toothpick downward to remove the string from the base part of the pod.
This way the string can be nicely removed from the pod all the way around.
The string at the base part of the pod can be removed successfully if you start separating the string from the top of the pod and continue around, moving the toothpick all the way to the lower tip of the pod!
Story Behind this Recipe
You often hear the advise to string the pod starting from the tip and then going all the way around it, but the string of some sugar snap peas can't be removed nicely and the tip part of the pod is too hard to work with... So, I tried to string them with a handy toothpick, and voilà, I was able to remove the strings easily!
It might be easier to remove the strings if you poke the toothpick slightly closer to the tip of the pod just like deveining shrimp.