How do I fix a keyboard card key?

After using the keyboard for some time, there will be some key insensitive, sometimes need to press many times to enter a character, such as the space bar, enter.

This performance is Kari, not only on old keyboards that are used long, but also on many new keyboards. There are two reasons for the keyboard Kari, one is the position of the key under the Insertion column offset, so that the key cap pressed after the shell and the key can not bounce. The second is to use the key for a long time, reset spring of elasticity, can not make the key to bounce, resulting in key card.

After the keyboard appears, you can unplug the key cap and press the lever. If you can't bounce by the lever, it means the second cause. If the key cap and the key body housing are stuck, you can put a gasket between the key cap and the key body, can be made of a little hard plastic, size and key body size is the same, and in the position by the bar through the use of a free pass through the square hole, and then set on the bar, press the key cap, the fault can be solved. If it is due to the aging of the spring, you can open the body, slightly stretching the reset spring, so that its resilience.