More complete answer...
If you are having steam problems then the cartridge needs changing.
I phoned them (0161 652 1211) and they do sell the cartridge for £5.99 including delivery but are out of stock for a couple of weeks. You have to send them a cheque or postal orders. Good luck.
Send Cheque for £5.99 for each cartridge with note of model etc.
Pulse Home Products Ltd.
Middleton Road
Royton
Oldham
OL2 5LN
Hitchu
October 2008