: an act of showing someone how something is used or done : demonstration. 1  I saw a demo on how to use the computer program. 2  The salesman gave us a demo of the vacuum cleaner, and it seemed to work very well. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples 3
If however, you are talking about some maggots in a bowl of wet food (either canned food or dry food which got wet or which you deliberately added fluid to) it is a different matter. Maggots come from flies eggs and they take some set period of time to hatch from the eggs.
To kill the maggots with vinegar, pour white vinegar directly over maggots living in garbage cans. Alternatively, fill a bucket with pure white vinegar and place any maggots found inside the bucket. Let the maggots sit in the vinegar for 20 to 30 minutes before discarding the dead bodies and vinegar.