Safety first pretty please.
One of my Patchwork group ladies was rushed to hospital last week, why? She was changing the needle on her machine WITHOUT TURNING IF OFF FIRST and in her hurry the needle went straight through her finger and jammed in the presser foot! They had to call the paramedics who managed to release her from the machine but she had to go to the hospital to have the needle removed, have a tetanus shot and a course of anti-biotics. She said the pain was horrendous but once the needle was removed she felt a bit better and both her and her machine are well on the road to recovery, although she will most likely lose the nail on her finger.
She realises what she did wrong and had learnt a hard lesson, so please take note, have a proper craft light in the right position so when changing a needle or cleaning your bobbin area you turn your machine OFF!