Do you find those in the kitchen or somewhere else?
It happened to me before that we had a pack (not tightly packed) of dried flowers in the drawer. Since humidity is high and it had been in the drawer for a few months or more than half years, some insects are automatically created.
When we found that pack and threw that away and kill the remaining insects one by one, that will be gone.
Rememeber that dried vegetables or red beans etc may also create those insects when you do not use it and keep for a long time. Check it out in your kitchen if you find this.