Reasons for poor insulation performance of cold-pressed terminals

How to effectively solve such problems when the insulation performance of the terminals is getting worse and worse during use? Let's focus on the main reasons for the deterioration of terminal insulation performance.
When some kind of poor contact occurs in the cold-pressed terminal or terminal, it is basically because a lot of pressure is applied to the external cable. The contact structure is good and the function is stable, but sometimes the structure is unreasonable and the mold is unstable.
The aging of the insulation performance of cold-pressed terminals is inevitable, and the aging of the insulation performance of wiring terminals will also occur due to the same reason, which will directly or affect normal use, seriously damage the device, and cause faults such as poor contact.
Cold-pressed terminals with poor insulation cannot be used directly. Must be checked before use.
Since the contact and the housing are insulated, if the structure of the two is not suitable, it will definitely be defective in use.
Because there are many metal objects on the surface or inside of the insulator, when the harmful gas is diluted or directly adsorbed on the surface, the use of cold-pressed terminals and connecting terminals is very dangerous, and may even cause damage to parts and poor contact.
If the solid in the cold-pressed terminal is poorly insulated, it will have absolutely no insulating effect, but the protection of solid insulation has almost lost its effect for a long time. In addition, there are also uses related to positioning and locking, but if it is still lacking, it will affect the normal use of the terminal.