I have some small black bugs on my kitchen counter that seem to be attracted to oil and sweets, as well as dry ingredients. They are about the size of a grain of coffee, and they have a bit of a hardened shell. They don't seem to fly, just crawl. Someone suggested using bay leaves, but this has done nothing at all to get rid of them. What can I do? They are driving me crazy! Thank you for any assistance you can give me.