I will agree with the previous comment that mentioned the fact that the product, if not on the first use, definitely on the second, when you press the lever to spray, it basically sprays your hands as well.
I don't know why, but I have bought it twice and both times it basically ended up being a wasted product, for no reason. Now, whether it does the job or not, it is ineffective. Well, you can't really say! There are better products on the market, much stronger, and this particular one always has a price in supermarkets that does not correspond to reality. Overall, I can say that this company...

It has "saved" me!! Although I had done pest control, I didn't rely on that alone because we had just moved into a house with a huge problem (which we didn't know, of course). Centipedes, ants, and cockroaches, of course. I was living a nightmare and when I saw how effective mec was...!! I have bought about a dozen so far. It doesn't eliminate them at the source, but I can't find anything alive. One morning, I saw a centipede as big as my foot (Oh horror) and I started spraying it... luckily it was already dead from the mec spray. It works for me. Now that the moisture worms have started circulating, it kills them too. It's a shame that supermarkets don't put it on sale during the winter.

I have emptied 5 bottles by spraying every week and yet the big cockroaches still pass through normally! I don't know if the batch is problematic or if there was a mistake at the factory, but they don't do anything. The production date is a few months ago and it's like plain water. One time, a huge one came out of the drain, which was covered with papers and sprayed many times, and another time a big one passed under the balcony door even after I had sprayed incredible amounts dozens of times. And they were running normally unaffected for a long time, they were not at all affected by the pesticide. I remember in the past I used to use Baygon Foam once and it would kill the big ones that passed even after months inside at most one meter. I stopped using it because the smell was terrible. With Teza, they walk normally for a long time as much as they want. I will try K-OTHRINE because I don't think these supermarket ones can kill the very big ones that come from outside and drains.

I have bought this product twice, problematic sprayer both times! It does the job with the liquid, but when you press it, it sprays on your hands and drips down! The same problem both times! So, I do not recommend it!