Getting Rid of Odor in RV Cabinets?

I bought a brand new RV this summer and I noticed a weird smell in the cabinets. I thought it would go away, but it stayed. When I closed up the RV for the winter I brought some food home and put it away in my kitchen. Now my kitchen cupboard smells the same as the RV even though I threw out the food and used vinegar, baking soda, and Mr. Clean. The smell is still there. Help!