Most likely they are fungus gnats. Don't actually harm the plant; the larvae live off of the fungus in wet soil. You can try watering less and let the top part of the soil dry out.

The only way I was able to get rid of them is to mix up a batch of insecticide that contains Bt (Bacillis something I think) and water once with that. It did work, but the stuff does smell a bit.

Larry

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"It only takes one child to raze a village"