I ordered the Drain Gel and used it in all my drains for 5 days, just like the directions say to do. They were completely gone until about 4 weeks later, the moth flies were back. I would look for something that gets rid of them and keeps them away for longer than 1 month.
In some environments such as restaurant kitchens where heavy and constant food prep is done, re-infestation may be inevitable. In these cases, the product label recommends to use 4 oz of drain gel every 2-3 weeks to maintain control.
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