Heat from a Lighter or Match: Carefully warm the key with a lighter or match, then insert it into the lock. Don’t over heat the lock.
Warm Water: Gently pour warm (not boiling) water over the lock. Make sure to dry it immediately afterward to prevent refreezing.
Lock De-Icer Spray: Use a commercial lock spray, which is specifically designed to melt ice and prevent freezing.
Alcohol or Hand Sanitizer: Applying rubbing alcohol or hand sanitizer to the key and then inserting it into the lock can help, as alcohol has a lower freezing point.
Hair Dryer: If you have access to electricity, use a hair dryer to warm the lock gently. Keep it at a safe distance to avoid damage.
WD-40 or Silicone Spray: These products can help lubricate the lock and prevent moisture from freezing inside.