Fungus gnats are winning and I am officially tired

Do the mosquito bit tea on a schedule, not just when you remember. I had to treat all pots on the same watering cycle for 3 rounds, each about a week apart. Sticky traps catch adults, BTI handles larvae. If you leave one pot untreated, it keeps restarting the whole mess.

I would add beneficial nematodes if the plants can tolerate slightly moist soil for a short stretch. They need moisture to move through the pot. Do not let the soil go bone dry the day after applying them or you basically paid for a tiny funeral.

Skip cinnamon. It makes people feel like they did something, but it will not fix an active infestation. The boring combo works best: fewer wet pots, BTI, sticky traps, patience.

Check cache pots and saucers too. I once had gnats breeding in wet debris under a nursery pot, not in the actual plant. If any decorative pot has standing water or old soil crumbs, clean it out.

If your mix is peat-heavy and staying wet in the lower half, drying the top inch will not be enough. Pull one of the worst plants and smell the root ball. If it smells swampy or sour, I would repot that one into something chunkier.

You do not need to toss 31 plants. I say this as someone who once bagged a fern and put it in time-out like it had committed a crime. Treat every pot, keep traps up, and give it a few weeks.

A plug-in light trap helped me knock down the adults in my plant room. It was not a full solution, but it made the room less annoying while BTI did the actual work. Put it near the plants at night, not across the room.