Hi Louis, it is quite possible that it is the door seal. As with all simple looking jobs, this is very fiddly with glueing involved.It is a job a layman can do but with a lot of patience.There are a couple of models of this machine but it looks like the same seal. Part no. 404001000 and they are £21 plus postage average.Hope this helps, All the best.
FOXY, August 2008