Can I put a little baking soda in my TT toilet?

We had the problem and bought the trailer new, so we know the common holding tank mistakes were not made. We had a slight odor and got one one these in WalMart: Cyclone It worked great.

The other posts here stating that something is wrong if you have odors are correct. Keep Looking. We had an undiscovered minor leak below the floor.

But the Cyclone worked great in the meantime also.