It looks like the ants are moving pieces of debris to the liquid baits. What are they doing?
It is nothing to worry about when you see the ants doing this. They are actually moving pieces of their nest to the liquid. They look at this liquid as a food source. You will want to make sure that they do not completely cover the bait to where they can no longer get to it or to where you would not be able to add drops to the liquid or keep it fresh.
