I think he means it won't turn back to 6, the max is 8 o'clock.
@Spod don't force it of course.
Try spraying in some WD-40 or oil alongside the key, leave it alone for a few minutes then try gently working it back and forth gently as far as it will go, it's a mechanical bind as it hasn't been used or lubricated for some time.
We should all remember to lubricate all the locks from time to time.
If you only have an oil can try using a hairdryer to blow it along the key into the lock.
I hope it works for you, let us know.
@Spod don't force it of course.
Try spraying in some WD-40 or oil alongside the key, leave it alone for a few minutes then try gently working it back and forth gently as far as it will go, it's a mechanical bind as it hasn't been used or lubricated for some time.
We should all remember to lubricate all the locks from time to time.
If you only have an oil can try using a hairdryer to blow it along the key into the lock.
I hope it works for you, let us know.