Bests & Worsts Reviews from Amazon

I had never had drain flies in 45 years in any house I lived in. We currently live in a old house with cast iron pipes that do get clogged regularly, and I understand that’s how they originate. This product does work but you need to be diligent and use it a few nights in a row but then it will sometimes cause them to come out of a different drain somewhere else in the house. So obviously you have to use it on each. My cautionary tale is this - do not just let this go untreated and think it’s not a big deal. We just had a few flies, not swarms, and not being familiar with what they can cause, I just let it go for a few weeks & said I’d take care of it at some point. Well then they lay eggs in your grout and you get an infestation! Google ‘grout worms’ if you haven’t heard of it. It’s disgusting. We had just some hairline cracks in our grout and that is all they need. As soon as I saw a couple near the grout line, I immediately sprayed Tilex with bleach and about 15 more came squirming out of the wall. I kept spraying them and killing them thinking that would eventually eradicate them, b/c it was bleach! Nope. It makes them squirm out but doesn’t actually kill them. Finally I sprayed some Raid and that actually killed them. And I didn’t even have any flies at this point hardly, just the worms! Then they will lay eggs in different corners of the shower, even just where the metal from the enclosure meets the tile. It is crazy. They will get in just the tiniest spot of mildew there. I ended up getting the grout replaced anyway b/c the tile installers did a bad job, and it is now sealed. The flies have only come back once since I had this done - probably b/c of a hair clog that happened at the same time- and I immediately ordered another bottle of this and did not waste any time. Keep your pipes clean, people! Also this doesn’t seem to have any odor but do not breathe it in, it will definitely irritate your throat.