How soft is too soft? If you’re scared to touch it, it’s too soft. If it leaves goo on your fingers, throw it away. If it looks like a deflated balloon, goodbye.
But remember: a little soft is just a potato having a bad day. Give it a chance in a soup or a bake. Just don’t ask it to be a crunchy chip.
So next time you poke a potato, embrace the squish. It’s a weird, wonderful little science experiment. And now you’re the expert on the squish factor. Go forth and poke wisely.