Just a few drops are enough to eliminate your gecko problem.
The substance attracts the gecko with its pleasant smell, and as soon as the gecko tastes the substance, it immediately falls dead in its place in a very few minutes.
The product is used many times and for a long time, because you only use a few drops each time to kill a group, so the product stays with you for a while.
To preserve the product for a long time, it is preferable to keep it in a cool place and also seal it tightly after each use.
It is preferable to place it at night when the gecko comes out to hunt insects.