I loathe overly ripe bananas so I always buy them slightly green. Usually they're fine once they've been in the fruit bowl for a couple of days but I've had my current bunch for almost a week and they're still hard as a rock and frankly, vile. I've just thrown one away after finding it was almost crisp in texture, with none of the lovely banana flavour.
I'm assuming that they're never going to ripen now. I've never had this before - any thoughts?