inkie

I can verify that the 2010's have a cabin air filter. I have an SE and although I purchased the car in April I had to change it. My wife was complaining and sneezing everytime she got into the passenger seat so I dropped the glovebox and changed it, The filter was black with an oily substance on it. Its very easy to change, the door has flaps on each end that you release and you have to juggle and pull the filter out from the left side. Also,the glovebox has a wire pulley that you have to disengage to drop the glove box. Someone with small hands can probably reach in and remove the doors without dropping the glovebox all the way.

I have used it on a Honda Accord and to me it was just like any other wax. I have been using Zymol which gives me better durability. If your interested in trying something thats less expensive than reflections try Maquiors Carnauba wax spray it gives a great lustre.

I have a 2010 and the cabin air filter lies flat behind the glove box. The 2009 filter should probably be in the same place. You release the glovebox so it will drop down and you will see the housing for the filter. Lets hope its just your filter and not mold or rotted debris in your ducts.