Aglaonema keeps getting fungus flies
So I’ve had an Aglaonema for about 4 months now and it keeps on getting fungus flies. At first it was because I watered it from the top of the pot a few times. But I stopped that very fast.
Once I got flies I used diatomaceous earth powder on the top layer it and it seemed to fix it.
Now I use the bottom watering method and I water once every 2 week with like 100ml or less. It was good for a month and a half but now I have flies again. And a lot. I put out one of the yellow sticky traps and I have over a hundred flies stuck on it.
My question is what am I supposed to do or what am I doing wrong? I obviously cant have this many flies in the house and it is getting a bit annoying while watching TV to have tiny flies flying around. Do I need to put a thick 1 inch layer of diatomaceous earth and cover thr entire top? I put spoonfuls at first.
This is the plant if you would like to see the pots bottom watering mechanism.
https://www.lowes.com/pd/Lowe-s-1-40-QT-AGLAONEMA-SIAM-WG/5013210411