Raid or whatever your local product name is that you plug into the electric socket and it evaporates poison which is harmless to you as there is very little of it but it kills them. Some have formulas against flies as well.

Also, if you are in ketosis, your blood is acidic and they hate it as they are attracted mostly to sweet blood. So they won't bite.

But I would definitely pay good money for some laser Tourette system to have in my room that would track movement in infrared with high definition camera and fry those ***. I saw some home made attempts but nothing commercially available - yet.