Theresa from Canada writes
There is not a set time limit on when to change the boards. You should change them whenever they get full of insects and not much of the sticky adhesive is available for new insects or if the glueboard gets too dusty and is no longer sticky. We would recommend checking them every 2-3 weeks and just changing the board as needed. Please let us know if you have any other questions.
Answer last updated on: 01/10/2013