There are a few things you can do to clean brake fluid:

  1. Pour a pot of boiling water onto the brake fluid and let it cool. Pour the brake fluid into a large bowl or glass jar and pour the cold water over it. Stir everything together and let it sit for at least 30 minutes.
  2. Use a plunger to push the brake fluid out of the bottom of the bowl or jar. Pour it into a clean container and store it in a cool place.
  3. Use a vacuum cleaner to suck out all of the brake fluid from around your brakes.