TERRO Drain Insect Killer - T590 Drain Fly Killer - Foam Drain Treatment - Drain Treatment for Drain Flies, Fruit Flies, House Flies, and Roaches

It does the job. No more drain flies for my bathroom!!!

ممتازه جدا جدا ومفعوله قوي وسريع

While spraying the solution stays liquid, and drain flies just escape via the drain back up.

easy to use

Great

Foaming is weak

Gave me 2 applications before it stopped spraying even though there is plenty of product still in the bottle. Not worth the price. Drain flies still present also.

Excellent

I can't say if this single product cleared out my drain flies but I did notice when the foam expands it brought all kinds of gunk up from the inside of the drain. Even after I thought I cleaned it pretty good. Gunk included a couple dead drain flies. Not sure if they were already dead or killed in the form but who cares - they're dead! I found it easy to direct the spray into the drain and it didn't take too much to fill the drain. I've still got plenty left after several treatments. My mom has COPD and I've got allergies that can be triggered by odor/perfume and this product did not cause any issues. There is almost no scent. I used this after letting Zevo flying traps (UV lights) run for about a week. Also treated the drains with Green Gobbler overnight. I still get the odd drain fly but I live in an apartment so it's possible some are coming over from other units.

We had annoying little drain flies popping up around our kitchen sink, and liquid drain cleaners just were not getting the job done. I bought this foam treatment, and it was a total game changer. The fold-up extension tube made it super easy to spray deep down into the pipes, and the thick foam expands so you can actually see it coating the inside of the drain where the bugs breed. I sprayed both sides of our sink before heading to bed, let it sit overnight, and noticed a massive drop in flies by the very next day. It didn't damage our pipes or leave behind any harsh chemical smell, and we haven't seen a single bug come back since.

It works well - I had a drain fly infestation! Used it in 2 bathroom sinks, two shower drains and 2 kitchen sinks and had a wee bit left over. I expected the foam to stick around for a while, but it evaporates pretty quickly. I haven’t seen any flies since. I bought a second can to spray the following week but I’ve barely used it. The worst part of this is that I find it very hard to get out of the can. It’s got a sort of safety, and between that and keeping the can upright so it sprays is quite challenging. I wish they’d change the disbursal design.

We moved into an older house and the drains were not only clogged but also full of gnats. I bought this and a product to unclog the drains. The first application helped tremendously with the gnats and clog. The gnats stayed away for a few weeks. I am assuming new eggs hatched because last night they were coming out of the drain again. I applied more of this product in the drain and left it overnight. There are dead bugs in the sink this morning and no more are flying out. You may need to do more than one application but it does work. I love the spray nozzle that allows you to get down into the drain. It doesn't have any chemically smell or strong odor. Easy to use.

PROS- I moved into a new place that had a terrible drain fly issue. I also noticed the occasional cockroach in or around the sink. This has eliminated them both. POSSIBLE CONS- Considering this worked, I'm perfectly OK with the cons. But just as a warning. It wasn't a one time fix and I had to repurchase. You need to be patient and prepared to buy another round. I had to do 3 treatments and it took an entire can for my double kitchen sink. I did them 1-2 weeks apart. After the first round, I noticed more gnats in the sink, but many of them were dead or dying. But with some persistence, I have gotten rid of them all!