I'd reduce your watering to let the soil dry out a bit, wait to water until the top of the soil is dry down to a half inch or so. A good way to gauge it is to poke it with your finger down to the first knuckle or so. If it feels damp, don't water. If it feels dry or barely moist then go ahead and water. I've found a lot of these soil pests go away if you let it dry out some between waterings.