How to keep these bugs out?

I live in an apartment complex, and the seal around one of the doors has a small gap in it. I'm not sure exactly where on the door, but I'm almost positive that's where bugs are getting in since I have only been seeing them in one room and they seem to be mostly found right near that door. Anyways, the bugs that are getting in aren't the typical things like ants/roaches that I know how to deal with...it's gnats, flies, spiders, lightning bugs, and things like that. Are there any specific sprays or anything I can use that will keep these bugs out? Does anyone have any additional suggestions or advice?

 

I would suspect the door threshold as well. That is the part underneath the door (when closed) that is at the bottom of the entryway.

Get an aerosol spray can that is labeled for “crawling insects” as that will leave a residual when it dries so that insects will pick up a toxic dose when they crawl through it. They will still get in, but should die off.

Open the door and spray the interior of the door frame top to bottom. Spray into the door sweep at bottom of door. Treat into threshold at ends and any screwholes and such. Treat exterior of door area too such as where porch floor meets wall, etc.

Now we still don’t know for sure that the door and entry is the problem here, but this should help us figure it out.

Flying insects don’t usually come into a residence the same way as crawling bugs do. Are you leaving windows open at night? Are their lights left on that will attract the bugs? Even tv’s will attract. All screens in the windows must fit well.

 

I always use the dust known as the diatomaceous dust to get rid of these pests.

 

Gnats and Flies can be difficult if they are flying in. If they are crawling like the others then diatomaceous earth should help. Put some where they will have to cross it to get in and that should help. You can also put some in the window sills.