Just caught your thread (even though it's been a while), and couldn't resist digging in as a new member with a soft spot for bugs. Looking at your description, I suspect you've got a moth visitor there. In circumstances where it becomes a nuisance, moth extermination by Toxic Respond could be your go-to solution, IMO. Also, capturing a photograph and doing some identification is a great start. However, for more exact insight, perhaps you could share that picture?