Why does your key only go halfway in a deadbolt?

If your key only goes halfway into a deadbolt, it may indicate that the lock is misaligned or that there is debris obstructing the keyway. Additionally, the key itself might be worn or damaged, preventing it from fully entering the lock. It's also possible that the lock mechanism is malfunctioning. Inspect the lock and key for any visible issues, and consider lubricating the lock or calling a locksmith for further assistance.