Place them near areas of high fly activity. This could be near the trash, litter tray, pot plants, or a light source like a window or ceiling light. If you are not getting good results, move the trap to another place.
If you are trying to trap fungus gnats, use your small sticky traps, and place them in the soil of the plant pot or bed.
If you are trying to trap fruit flies, use our small sticky traps for plants above a cup of vinegar with a drop of soap. Or use our fly sticks and place something sugary or vinegary in the bottom dish.