Hi, I have a Hotpoint washing machine and the belt keeps slipping off inwards towards the drum. I had ordered a new pulley wheel as the outer surface was smooth so seemed to allow the slipping. I had thought there maybe was a ridge that had worn over time however the new wheel was smooth like the old. The belt doesn't seem overly loose and takes effort to put back on. I can't see any obvious damage to belt or pulley wheel that means this has suddenly started. Any help appreciated