How to deal with the bad opening of the anti theft door?

There are several stiffeners in the interlayer of the anti-theft door body, and are filled with foaming agent, rock wool and other fillers, among which rock wool is the material that can be soundproofed, but there are also anti-theft doors that do not put rock wool inside, the sound insulation effect of such anti-theft doors will be much worse, it is a little difficult to modify the anti-theft door, and the best way is to install a wooden door. Security Door Matters Supplement: >>>More

It's not easy to open, is it the kind that the handle on the outside can't be pressed and can only be unscrewed with a key. If it is difficult to screw it, and it is easy to screw it by pushing the door with your hand, it is locked, and you can smear some butter on the lock plate. It is estimated that it is caused by aging, and the anti-theft door should still choose the top ten brands, with a long shelf life.

Your situation may be the reason for the lock cylinder, you are not oiled! If it is oiled and needs to be cleaned, if it is not necessary to remove it for lubrication, your key is not a flat one.

Let's take a look at what the sound is, if it is a hinge, you can use some lubricating oil, it is also possible that there is something dirty inside, you can wash it with water first, and it may be that the rubber strip is loose, if the hinge is loose, the door leaf is small, and it is possible to squeeze into the rubber strip, there will be a sound, if it is the tongue of the lock, do not use lubricating oil, you can use pencil foam, the effect is very good, you can try.

You can't add engine oil, you can add two substances:

Grated pencil shavings. >>>More