Dave and Cheryl, I bet your are smelling the sink itself, when you use the covers. I remember when our unit was new and I would put the covers on and when I took them off I would smell a funny smell. I didnt do anything and use the covers all the time and that funny smell went away.
2005 2955RL Montana
2002 Chevy 2500HD 8.1 Ext Cab 4x4
Bob and Kathy