The door lock is too tight

- Mar 09, 2019-

Lubricants Some friends tend to drop some lubricity into the keyhole when the door locks are bun or tight, so that the door locks may be smooth, but because the oil is easy to stick, later In the keyhole, it is easy to accumulate dust and form oily putty, which makes the door lock more prone to failure.

The correct solution: cut some pencil pieces or some candle pieces, blow them into the inside of the lock cylinder through the thin tube, and then insert the key repeatedly for several times.