They make a 3/8" hole get a dowel rod cut it in pieces. wait tell nite. put a dowel piece in the hole. Leve it their. Now when new holes apear put in another dowel rod. After awhile you will get them. When you see no more. Take out the dowel rod's or pound them in and sand off. That's how i got rid of mineHow do I get rid of carpenter bees they are making holes in my kids swing set made from cedar how do I get rid of them or can I just seal the holes ??