Anyone ever use peroxide and water to get rid of bugs on soil?

Anyone ever use the peroxide and water mix to get rid of bugs in the plants?? I was told if you use 1 to 3 ratio it will rid of bugs laying in the soil. I am having a problem with what I believe are fungas gnats, they suck! Eating my leaves leaving brown spots on them. Some of them are white, others black......all very very small and a few gnats (i would assume fruit fly looking things). Hoping someone had some luck with this. I tried using Ortho ecosense insect soap...........uhhhhh not so much.



Thanks