That not so sweet smell

I must confess, I am very  happy with my dye job.  I must also confess, I hate the way my vacuum smells.  I love to vacuum with my Sebo.  I love using my vacuum so much that I often vacuum more than once a week (that's a lot for someone who hates to, and avoids cleaning the house).  I have all those coffee grounds in the  bag now, and when I vacuum the room I am working in begins to smell like coffee.  I would love to just change the bag out, but the bags aren't exactly cheap.  Maybe I should just make a bunch more messes so that I have to vacuum the bag full this week.   The disappointing thing is, I made bread this morning and now my house smells like coffee instead.