Did you clean the USB ports integrated on the computer or other devices? For us, it’s really a problem easy to be overlooked. So we found this USB port cleaner.
The gadget looks really like a tiny USB flash drive without cap. Of course, there is no flash memory in the shell. The connecting finger part has been replaced by cleaner. You just need to plug it into the USB port and plug it out, repeating the action for several times. Then the oxide and dust will be removed.
The USB port cleaner is priced at $17 USD. If you also often forget to clean the USB ports, put the cleaner in your laptop bag. It’s available at Brando.