The anti theft door key does not open the door smoothly, can you drip sewing machine oil

Not necessarily the door is broken! Generally, there is a small pimple on the inside of the security door, and if you twist it, the key on the outside will not be opened. It's the last level that locks it. >>>More

If your home security door is a cross lock (the key head is a ten-sub frame) or a magnetic lock (the key is a round iron rod with only a protruding point on the bare light), then it must be the thief who opened the lock with a lock picking tool, so quickly change the lock. Call 114 to find a local lockpicking company, it may be more expensive, but they generally abide by professional ethics, and your safety is guaranteed.

Insert a suitable screwdriver into the keyhole, twist the lock cylinder with both hands and it will break, dial it out and discard, and then dial the paddle in the keyhole, and twist it with a screwdriver a few times to open it (like twisting the key).

If you have strong hands-on ability, loosen the thread to see if the position of the square tongue of the handle is to wipe the door! If you're too lazy to do it, look for the seller to help you take a look!

You can fill the keyhole with pencil ink or lubricant and move the key, and then try to pull it out. >>>More