I probably would want to stay away from anything that is waxy/melty due to having two very nosy cats inside. I had tried the Glade plugin that was an enclosed package with liquid type stuff inside that you would slide into the plug-in. I guess they don't make the refills for those anymore. I do see a glass container filled with liquid that you snap into the newer style plug-in and then into an outlet.
I just don't have enough outlets in the house to use one in each room for this and then I wonder does it cost money to have that hanging in an outlet?
I guess I need a non-wax, non-candle, non-electric and that just might be very hard to find. Maybe I need to invent something. I could be a billionaire sitting on some warm beach somewhere and not stuck her in the Midwest freezing while it snows foot after foot of snow!
Alice