Grrr, I've cleaned it, cleaned out the hole at the back, defrosted it......have tried it on lowest setting right up to highest setting, but still my veg are freezing solid in the fridge. They're in the veg compartment at the bottom, not on a shelf and definitely not touching the back of the fridge. Any thoughts? How do I stop the fridge from freezing them? (Doesn't freeze anything else!)