The aging and hardening of rubber strips is due to the long-term influence of sunlight, oxygen, temperature and other natural environments, resulting in the breakage of rubber molecular chains and the reduction of crosslinking, thus losing the original elasticity and softness. To deal with the aging and hardening of rubber strips, the following methods can be considered:
1. Replace the rubber strip: If the rubber strip is seriously aged and can no longer be used, then replacing the rubber strip with a new one is the best solution.

2. Apply rubber softener: You can use a special rubber softener to apply on the surface of the rubber strip to soften the rubber and restore its original softness and elasticity.

3. Apply lubricant: You can use some lubricant (such as silicone oil) to apply on the surface of the rubber strip to make the surface smooth and restore a certain degree of softness.
4. Sun protection: During the long-term use of rubber strips, some measures can be taken, such as installing awnings and sunshade nets in outdoor places, to reduce the time the rubber strips are exposed to sunlight, thereby slowing down their aging speed.
It should be noted that the above methods are all temporary treatment of the rubber strip, and cannot completely solve the problem of the aging and hardening of the rubber strip. In long-term use, it is still necessary to replace the severely aged rubber strips in time to ensure the use effect and safety.