FUNGUS GNATS – I’m so over it!

I love my indoor plants on my window sill, but I got fungus gnats. I tried everything I googled and even ended up totally changing the soil all together and repotted- and they’re back!

I don’t understand! What am I doing wrong here. I’ve tried:

– Watering with a 1:4 3% Hydrogen Peroxide:Water mix.

– Water with Neem Oil

Still there’s a few flying around and in the yellow sticky traps I have on each plant.

I have no idea what to do.. I want these plants they’re great and really enjoy the greenery, but I can’t deal with the gnats!