Nintendo Switch Joy-Con Controller Not Responding Correctly - How to Fix

One of the flaws that the Nintendo Switch came with is the occasional Joy-Con not responding. These controllers have been in the habit of disconnecting from the console. This has shockingly been a really basic issue among early units, yet it still affects many console-owners.

What Happened?
A manufacturing variation has resulted in wireless interference with a small number of the left Joy-Con. Moving forward this will not be an issue, as the manufacturing variation has been addressed and corrected at the factory level.

How to Fix the Issue?
For the existing Nintendo Switches, we have determined a simple fix that may help in fixing the Joy-Con to improve connectivity. The steps for the fix include:
1. Grab a toothbrush. Now, remember, this should be a clean toothbrush as you are going to clean the dirt that may be affecting the Joy Con controller's connectivity.

2. Wet the toothbrush with a small amount of isopropyl alcohol. Make sure to not completely soak it as this can cause a more severe issue if the liquid gets to the chip beneath the joystick. Just touch the alcohol to the brush to wet it.

3. Brush gently underneath joystick. This will clear out all the dust and dirt that is gathered around the joystick.
4. Once you are done, start your Nintendo switch and check if the problem is resolved.

If the problem is resolved, then that’s great! However, if it still persists, then it might be time to call the Nintendo customer support center and tell them about the issues you're having. Hopefully, they can figure out what is causing your Joy-Con to not function properly.