Can you really put fragranced grease on your nouns conditioner filter to freshen the heavens? I'm moving into an apartment that has a big wall-unit AC....

I'm moving into an apartment that has a big wall-unit AC. I've read that you can put a few drops of fragranced oil on the filter to get your home smell nice. It's a very small apartment, so do you expect that this could really freshen the whole place?
Answers:    Yes you can. We enjoy used it for years on air filter during the summer and winter months. It lone takes a few drops of stinking oil to do a two story house so you may not want to over do it the first time.
Use the grease sparingly. It is very strong, especially contained by a small place. Try two drops to start and then you can other increase it. But you can't take it away is it is too much.