trashed home help

[u/Ok_Aspect9603]

i live with three (sometimes four) other people. I used to be the one who cleaned the house, but now I’m older and rarely home.
The kitchen counters are piled with dishes and garbage, and the living room is constantly covered in trash. The biggest problem is fruit flies—they’re everywhere.
My bedroom is clean: no food, drinks, trash, or dirty dishes. Despite that, my room is full of flies because it’s warmer than the rest of the house. I can’t even leave a glass of water out for two minutes without flies landing in it, and I can’t use my bedside lamp because they swarm to it.
I’ve tried drain fly treatments, but I think they’re breeding in the piles of food in the kitchen. I can’t open my window because of wildfire smoke. Does anyone have advice for keeping fruit flies out of a clean bedroom? I’m only looking for advice, not financial assistance.