TerroDrain Insect Killer - T590 Drain Fly Killer Spray - Foam Treatment for Fruit Flies, House Flies, and Cockroaches

This stuff works and I am pleased with the out come but it did take three applications. I live in an old house, about 100 years old and the gnat's seem to appear every summer. I also live by a lake so I don't know if that has anything to do with it. I would say it was an infestation, I couldn't eat without them buzzing around me. I am one of those people that is a bug lands in my food, it's now the dogs food so these things were maddening. (And yes, I know it's irrational to stop eating your food just because a tiny bug lands on it but gross's me out and that's the way it is.) Forget about drinking red wine because they love it and land in it immediately. In any event, the gnats literally drive me crazy. I hate them! I have tried everything to get rid of them. The vinegar, soap, water traps. The lights with the sticky cards. Anything I could find. These traps catch the gnats but they don't get rid of the problem. I saw this and thought I would give it a try. I ordered two cans to start with because I have three full bathrooms, a utility sink, plus the kitchen sink. The first time, I performed the application at night on July 7th and then went to bed. I used both full cans, which was mainly because I was figuring out how to use it properly and I put almost a full can in the garbage disposal. I would say in the next couple of days you could see a significant reduction in the number of gnats and I found several in my bathrooms dead. I figured it would take a couple of applications due to the other reviews that I read. Within about four days, I saw them beginning to increase again. I ordered two more cans and applied about 1.5 of them the night of July 12th. That is 5 days following the first application. Following that application, there was another significant reduction in the gnats and I was still finding dead gnats on my bathroom floors. After the first two applications there was a significant improvement in the quality of my life. Just chipping away at killing these gnats and I was/am determined to rid my house of these pests! Ordered two more cans. I was leaving for the weekend so I thought a perfect time for another application and then it would be able to sit for a couple of days. Applied another ~1.5 cans on Friday afternoon around 3:00pm on July 18th. Returned Sunday July 20th early evening. To my shear delight, I did not see any gnats! Monday, I saw one gnat. Tuesday, I saw one gnat. Wednesday I did not see any gnats. It is now Thursday morning and I have not seen any gnats. I am hoping that is the last of them but I still have enough product for another application if it is needed. So, in summary, it has taken me close to four cans to fully eliminate them over the course of 16 days. I ordered a total of 6 cans at a price tag of $95.82+tax so over $100 in total, so not cheap. Also, pretty sure the stuff is toxic because it says something about hazmat on the label for shipping. Hope this helps.

TERRO Drain Insect Killer has a mighty dry foaming formulation that worked to kill the gnats that pester our drains.I ordered two 8oz spray cans to treat the drains throughout my home. Every year, my old farmhouse seems to be taken over by these tiny insects. When they get in our drains, it is hard to rid them until I used, TERRO Drain Insect Killer. The spray can is equipped with a yellow straw that fits down into the drains for ease of treatment. I followed the recommended steps listed on the can with positive results, after two full treatments.This works and I highly recommend! Will be using TERRO DRAIN INSECT KILLER anytime my drains are taken over by gnats!

It works great. Drain flies have been almost impossible to kill and we’ve used so many different methods. This stuff is expensive and it doesn’t last long because our shower drain line is so long but boy does it work. After just a few treatments, they went away. And now we still order but use once a week for maintenance.

I am missed on this product to kill drain flies. Very easy to use just insert the spout into the drain until the foam comes up the drain. Let it stand either over night and then flush with hot water. Very easy process. You may need to apply at least for a week to rid your home of awful drain flies and flying gnats.

Can quits before you run out of insecticide

I was having an issue with nat’s out of nowhere in my kitchen sink. I tried several different things (bleach&water, flying insect spray) and the plastic red apple bug trap to no avail. We clean as we cook at my house so our kitchen stays clean so the nat’s are a mystery that seems to come every two to three years. I read the can and applied the spray just as laid out on the can per the manufacturer. It foams up into a rather thick foam that reacts kinda slowly. The next day the nat’s were no more. To this day they are no more. So for us this spray foam was the eviction notice we’d been looking for. Worked just as advertised.!.!.!.

I moved out of my home to put it up for sale, and when I came back over there was so many drain flies I was really worried and upset, I called and exterminator and they said there was no guarantee that they could get rid of them. I used this product in the drains, and put stoppers over the drains and when I came back the next time they were all dead except for maybe five. The next time I came out to the house there was maybe one alive. So this product really worked and now my house is pending sale! Yippee you can't go wrong with terro brand.

This stuff works, haven seen a drain fly in 2 days, I did have a subscription but, I say but, because the packaging sucks, I got 4 cans, only 1 worked properly, the other 3 I had to kill myself trying to push that button to release the foam, and the last can died but it still had almost half a can of foam inside!