Not charging/intermittent charging/stop working:

• Wipe clean the tip/pins of the Anker cable with alcohol
• Try the Anker cable with another device and charger to see if the issue persists
• Try the original cable that came with your device to see if it has the same issue

Slowing charging issue:

• Wipe clean the tip/pins of the Anker cable with alcohol.
• Compare the time when you are using our cable and your original cable with the same wall chargers to charge your phone
• If the time difference is huge, please try the Anker cable with another device and charger to see if helpful.

Display-related issue:

• If the USB C port of your laptop cannot support DP Alt mode(video output), we are afraid that you are unable to get a display through our hub. To confirm this, you can also consult your laptop's user manual, contact the seller, or check the manufacturer's website 
• If you confirm the USB C port of your laptop can support DP Alt mode, please try other HDMI cable works with your laptop and monitor or not
• Try the Anker cable with another laptop and monitor to see if helpful

Common data transferring issue:

Please know the data transfer speed of our cable. Here are the specifications: ThunderBolt 3.0: 40 Gbps(5GB/s) ；ThunderBolt 4.0: 40 Gbps(5GB/s) 

• Wipe clean the tip/pins of the Anker with alcohol
• Try the Anker cable with another device and computer.

Slow data transferring speed:

• Wipe clean the tip/pins of the Anker cable with alcohol.
• Compare the speed when you are using our cable and another cable
• If the speed difference is huge, please try the Anker cable with another device and computer to see if helpful.

What should I do if the cable has frayed/physical structural damage?

Please contact support@anker.com for the warranty claim and suggest you not keep using them due to the safety risk. 

There are some articles about thunderbolt cables for you:

Thunderbolt Cables FAQ: Anker-Thunderbolt-Cables-FAQ

Introduction to Thunderbolt Cables: Introduction-to-Anker-Thunderbolt-Cables

The differences between USB C cable and Thunderbolt 3 cable:

What-are-the-differences-between-USB-C-and-Thunderbolt-3

If you have any questions, please contact us for further assistance.