Sentence:  Once the bottle is opened, the starter may develop again if the vinegar is in your cupboard for awhile. If its appearance bothers you, strain the vinegar through several layers of cheesecloth into a sterilized bottle. <WSD>Motherless</WSD> or not, vinegar has [...] 
Meaning of the word marked with <WSD> tags:  Without mother (mucilaginous substance in fermenting liquid).