@Grivusangel -- I had a bout with weevils, too. I started keeping all my flour and cornmeal in the freezer! That did the job. No more weevils. I have metal cabinets now and I haven't seemed to have a problem. I had wooden cabinets in my other house and they were a constant problem, no matter how much I cleaned and disinfected inside them.
I haven't been keeping my flour in the freezer since I've had the metal cabinets and I haven't had the problem again. I don't know why that would make a difference. Maybe they just multiply in and on organic material, like wood.