Hi, it's Allie from Crucial Vacuum!
Vacuums are supposed to help your home smell better, but when they don't there is definitely something wrong. Odors in vacuum cleaners can be caused by several things. If the vacuum is a bagged unit, replacing the bag often will help in minimizing any odors from debris caught inside the bag.
Keeping your unit's filters clean and replacing them periodically will also reduce unwanted smell in your unit. Washable filters are recommended to be washed at least once a month and replaced, as non-washable filters, every 3 to 6 months.
Finally, if your unit is a bagged unit you may benefit from using a scent tablet that you can put inside a new filter before running your unit. You can try these fresh scent tablets: http://www.crucialvacuum.com/vacuum-scent-tablets-10pk.html
You can purchase direct your replacement filters and parts from Crucial Vacuum with free shipping and an exclusive 10% coupon for Fixya.com readers, use code: FIXYA10
I hope this was helpful. If you would like further assistance, please feel free to give us a call at 877.750.9239. We have helpful and friendly customer care representatives on the line ready to assist you.
Alejandra (Allie) Sepulveda-Rivera
Crucial Vacuum Customer Care