Mine melted twice!
I am also disappointed with this vacuum. We have had the same problem with the belt slipping off and melting the plastic casing around it. During the course of normal vacuuming it suddenly starts to make a loud noise, and then pieces of the melted plastic are all over the floor. After that it has to be repaired (took 4 weeks for a part the first time). I bought this a year ago and expected a $150 vacuum to last a lot longer. The first time it was repaired for free under the parts warranty but now the time is up. I think I will be throwing it out and replacing it with something that doesn't have any plastic around the belt! Hasn't this been RECALLED yet???