Mother of Vinegar
In French, the word "vinegar" means "sour wine." Vinegar contains "mother" strands of proteins, enzymes, and friendly bacteria that give the product a murky, cobweb-like appearance. While not appetizing in appearance, it is quite common. You can continue to use as is, strain it out, or try adding to white wine and start your own batch of vinegar!
Mother of vinegar has probiotics, which aid in digestion and in creating an environment of healthy bacteria in the stomach. It can also be helpful for diabetics because of its ability to lower blood glucose levels.