I never thought of vinegar too! I do wash my foam filters whenever they need it (usually once a week or so). I plan on doing a serious dismantling of my vacuum tomorrow, haha, I'll let you guys know how it goes. I can't wait, in June I move into a different house with more hardwood floors. Only carpet in a few rooms.
Also- I've never tried the febreze ones, they don't have them at my regular store for my vacuum. I'm going to the new wal mart and hopefully they will have them! If not, I'll just order some online and give them a try. Thanks!