The first thing we recommend you do is get a positive identification on the insect you are trying to eliminate. Many of the tiny flying insects get misidentified by home or business owners which leads to ineffective treatment programs. You can contact your local cooperative extension office and request to speak to the entomologist on staff. The entomologist will instruct you on how to obtain a sample of the insect and send it to them. If, as you thought it is indeed fruit flies then you MUST find the source of the infestation. Look under stoves, refrigerators, counters and the like for spilled fruit juices or fruits. Performing a thorough sanitation should help eliminate the source of the infestation.
The Natural Catch Plus Fruit Fly Trap is not refillable or reusable and I am not aware of a trap that is for fruit flies.
No, the Natural Catch Plus Fruit Fly Trap does not have an odor.