The best way to clean the dentures is to soak the dentures in a denture cleanser like Efferdent or Polident for 15-20 minutes. After soaking them, use a denture brush and remove all debris as best as possible. It is important that you clean them off following every meal. Stay hydrated as much as possible (with water). When dentures become dry, they tend to
accumulate plaque and tarter. This will carry an odor. If you have full dentures, you still have to do oral rinses with mouthwash. Be sure and clean off the top surface of your tongue daily. You may also schedule a dental appointment and have your dentures professionally cleaned.
I hope this helps.