little black flies, look like fruit flies or gnats

can anyone tell me if these ingrediants of mouth spray will kill the bugs that are underneath my compost. thanx ingredients .aqua.alcohol.glycerin.sorbitol aroma.peg-40. hydrogenated castor oil.sodium sachhan.sodium benzoate.citric acid.celylpyndinium chloride.citral.limonene...

[video=youtube;Q8hvtQGEb7Q]http://www.youtube.com/watch?v=Q8hvtQGEb7Q[/video]