I have several sundews (rotundifolia , pygmy, filiformis ) in my terrarium but I don't see any dew on them any more.
I water them top down and they also have water in their bottom cups.
2 growlights GE are few inches from them and have enough wattage. Could it be the dewless is caused by being too close?
Otherwise they are healthy and growing but dewless. I am clueless about this.