I think you have a Morphy Richards steam generator iron, model 42238.
The manual is here:
http://www.morphyrichards.co.uk/Pdf/IB42238.pdf
You DID check that, didn't you?
It only says to replace the anti scale filter ASAP and how to clean the sole plate.
You could always ask Morphy Richards for their advice.
XXX, February 2016
