Small Nats in Indoor trees

noticed I have what seems to be small nats flying around the trees. I thought I had two house plants that were planted with standard dirt with my Bonsai to be the issue. Iremoved them but still have the nats.

Is there anything out there I can spray or put down to kill these pesky nats? I have ficus, brazilian rain trees.

Thanks

Fungus gnats are often a sign of overwatering or a growing medium that is too water retentive. There's a lot more info here

great. thanks for the confirmation. I thought it was the dang house plants causing this. I have removed the plants from the bonsai room.