I have battled carpenter ants for years and have had professionals treat for them but they still return every spring and summer. I noticed numerous ants going up the side of my house and started treating them with advion gel. Today on the back of my house I saw another row of ants going up my house. There is also an approximately 6" x 4" carpenter ant nest below an overhang on the outside of my house. I placed advion there as well and have some Termidor on order. This nest scares me! Is it time to call a professional?