“nut comes undone off of the drum? my machine is still under warranty ,but the nut keeps coming undone on the bottom of the drum. had repairman fix once, I fixed again as I did not want to lose a days pay waiting for the repairman to do a 2 min fix. Is this a continued problem, as I can tell when I falls off as the drum scraps against the plastic guard and makes one heck of a racket. Any solutions.”