Why are cluster munitions so notorious for leaving unexploded bomblets around?

Question

Is it poor build quality or are they not designed to explode on impact?

In: 1717

Answer 1

For each bomb you make there is a small chance that something goes wrong (including the impact itself) and it wouldn’t explode. It’s small but it’s there. Cluster bomb = 100x more bombs per bomb. So, 100x more unexploded bombs with the same build quality.