I have one too, had the same problem. Unplug it, pull out the big filter at the bottom and put your hand to the back of the dryer's filter compartment, you may find its collecting water. Feel around for a small channel, this blocks up sometimes with gunge, you need soak up the water and clean up the gunge. Ive opened up the small grey box on the reverse of the dryer before and cleaned inside (quite fiddley though!) Im now looking for a cheap heater element like the rest of you, if anyone finds any please let me know!
Hope this helps!
Jon, February 2008