I recently took delivery of a used Seal Jumbo 150 press. The felt on the base is very dirty (a damp cloth on it picks up black stuff - is this from previous heat sessions?) and I would like some way to either (1) clean it well or (2) replace or cover it. Any thoughts? Finally, I believe I will need a transformer of some kind so that I can use it here in Sweden. Anyone in Europe have one of these that they use with a transformer? Which transformer do you suggest? Many thanks in advance.