Is my microwave disrupting my Wi-Fi?

In this episode of Ask the Naked Scientist: does miso ferment differently in space? How can I improve my memory? Could receiving hepatitis A, tetanus, and typhoid vaccinations, in combination, cause chronic fatigue? Why does food go bad, and are food packet instructions accurate? What is brain plasticity, and how do we train it? What is mindfulness? Is my diabetes causing a strange smell in my urine?