Go to a hardware store, rent that crappy red box with wheels, put in minimal amount of soap, make girlfriend/wife push around for awhile, return claiming it didn't work properly and No, you do NOT want another one to try as you are DONE with this place, storm out with money refunded and tired wife/girlfriend.
EDIT: If you don't want to scam the place they will just rent you the thing pretty cheap if you don't mind doing it yourself.