My vacuum cleaner has ‘bad breath’. what can I do fo fix it?

bad breath
Blue Puppy asked:

My vacuum cleaner spews out a bad smell whenever I use it, even if I have already emptied its contents. I use an Electrolux Ergorapido 2-in-1, which is the type that uses a canister (not bag). Is there a way to make the air coming out of the exhaust smell better?

Bad breath Gone