This was taken from a site and might help a little: btw here's the link. http://www.rmca.org/Articles/odor.htm

"Passive room air cleaning. Baking soda in a dish or satchel chemically reacts with odors in the air and thus acts as a chemical air cleaner. Activated carbon or zeolite in a dish or satchel physically traps odor molecules in the air and thus acts as a physical air cleaner. Each of these three products removes different types of odors, so it may be most effective to use all three types simultaneously. Both activated carbon and zeolite can be partially recharged by heating for a few hours to ~800°C and ~400°C, respectively, but these are temperatures not normally achievable in the home. Many zeolite products claim they can also be recharged by heating for a day in the sun; this may or may not be true. Replace zeolite if it no longer seems to be controlling odor. Finally, all three types of products are safe to ingest and may also be used directly in the cage. For me, however, baking soda is too dusty and activated carbon and zeolite are too expensive to use directly in the cage."

hope that helps a little and the remedy for the respitory infection is above posted under alan's name on accident, but it does most def. work.