from what i was told the same thing that work inside to get rid of them is the same thing that will get rid of those outside which is the vinegar and liquid soap in a container with a cover plastic wrap or a lid with holes in it, i have some that fly around outside my door i am going to try it and see if it works good luck to you.
One way to rid plants of pesky gnats is to make sure that you are not over-watering. If you let the soil stay wet all of the time, it can attract gnats. Another way to rid your plants of gnats is to keep small bowls of apple cider vinegar out near the plants.
One way to kill gnats outside your home is by using bug spray on your entire yard and outside areas. Prepare a bowl of white vinegar and dish soap that is covered with plastic wrap with holes poked in it and place it outside to attract and trap gnats.
Yes, gnats can come out of dirty air vents. Gnats can actually come from anywhere. They are very pesky creatures.
You can get rid of sand gnats by treating the area with product such as permethin. An exterminator can also help to rid sand gnats with proper treatment.
Repot your plants every six months and use yellow sticky pads. They are hard to get rid of though. Try sprying the soil area with Neem Oil, it will smother them.
In order to get rid of gnats in a restaurant, be sure you get rid of any trash laying around. Be sure you clean up dirty dishes and glasses, as gnats are attracted to grime. If worse comes to worse, use a gnat killing or repellent spray.
Probably look up gnats and it should pop up
This depends on the source of the gnats. If the gnats are coming from plants, it is a sign of overwatering. If they are not actually gnats but fruit flies, they are coming from a food source. Make sure employees are keeping any food kept at their workspaces sealed, the trash emptied and and any kitchen area clean. They should disappear once their food source is gone.
Fungus gnats can be a nuisance to some people. They can be eliminated by the use of a common insect repellent.
They are just fungus gnats from over watering. Set it outside & dry it out some & they will disappear.
Vinegar won't get rid of them, only trap some adults keeping them down. If you have small flies breeding indoors it is keyed to moisture- leak in a wall, overwatered plants, drains, etc. Find that source and dry it out and they will die out. If it's fungus gnats from a plant, Take it outside.
A bribe with money to get them to the cinema LOL
weed and marijuana
Go fishing! The fish love gnats. Unfortunately, they are pesky little things. The best thing to do is get "bug zappers" and wear bug screen. There isn't much else you can do. There is just one other thing (after putting up a bug zapper) is to have a fan in the room blowing on medium. Bugs don't like a strong breeze. Good luck Marcy