The key was stuck in the lock
There is a thing called the wax that you buy a bottle, spray like it! Get some oil into the keyhole inside and outside the rotation
To the keyhole irrigation point pencil gray more than open several times like, do not lock the oil in the keyhole, or not a few locks on the scrapped.
Do not pull hard. Try to inject a little oil into the keyhole, no matter what the oil can, and then gently turn the key, and then pull out. The reason is: you use the key is not often used, the card is not easy to slide the card beans, the spring can not work, caught the key caused.
