Cool. Welcome Tramp.
Have you done a very simple thing, like empty the bowls using the screws on the bottoms of
each bowl. Sometimes a drop or two of water will have collected there.
I suggest placing a large rag underneath the bowls to catch the gas, if you can't get a small enough
funnel/collector. Then hang the rag out to dry, or place in a sealed bag then into the garbage.
Peace,
michel