DO'S
- Seek help as soon as a lock becomes awkward or temperamental
- Protect a lock from the weather if possible
- Try new keys with the door open
- Call in a qualified locksmith
- Use extra force to turn a tight key: the need for more than hand pressure indicates something is wrong
- Use oil or grease in a lock
- Drop keys or toss them down; do treat them gently
- Let well meaning but inexperienced people repair locks or make keys
