Since we have lived in this house, I have smelled something wrong in the kitchen. Often it smells like something died under or behind a cabinet and sometimes it’s not bad at all. It is worse when the weather is warm. 
I believe I have solved the mystery, but I don’t know how to get rid of the smell. Someone before us must have allowed an onion to go bad inside the island cabinet. The smell permeates the plywood.
Please dearest readers, what do I do to rid the cabinette of the smell?
I’ve heard that charcoal can help, but how does one use it?
Rescue me please. . . .