Once again, we want to emphasize that you should use a small amount of rubbing alcohol. This is because using too much can penetrate the mesh of your earbuds as you clean them, which can damage them beyond repair.
The simple DIY approach is to soak your sneaks in warm water for a short amount of time. Next, use an old toothbrush and some toothpaste to lightly scrub the affected areas. You’ll want to leave the toothpaste there for about 10 minutes, then wipe it off with a dampened washcloth.