The source for all ingredients should be non-toxic, safe and unscented.  Even natural scents can be an irritant to many people.

We need paw wipes for dogs...safe for them and the earth, please.  It's a dirty world!

This might sound like a "cash in the trash concept", however,  I know companies have come up with scented trash bags to cut down on odors, and poeple put their trash cans in other rooms to cut down on odors, but what about an adhesive "odor eater" pad that sticks to the top of the trash can lid and draws the odors from in the trash to reduce the smell.  I know this technology exists (bread sucking the moisture out of the air, they have packets you hang in your closet that pull moisture out of the air).  Generally people don't by lids, but for those who do you're just "containing" the odor and get a fresh whiff everytime you do open the lid.  It would create a pretty bad funk putting an air freshener in these places, I like something that "eats" the odor.

Perhaps making them of Clorox would better eat the odors  better if neutralized with chemicals without smelling super sterile.

They would last a week.

I also think you could use them in the bathroom on the back of the toilet bowl as well to draw in and eliminate odors, put them under your sink.

I chose to put this in the Green Works category because putting up a Clorox-scented sticky odor eater pad would seem out of its element if not used in the kitchen or bathroom.

As of now I don't know the dimensions-you want it to be small enough to "hide", but big enough to last long.

I use it a carpet spot cleaner.  

A floral essence or citrus smelling vinegar window spray by Green Works would be AWESOME!  Vinegar works great to clean windows with no streaks and is safe on the environment.  The floral or citrus essence would leave the room smelling fresh without being overpowering.