I was a HUGE fan of Rowenta ... but I just had the same issue with the second one in 6 years. Something has gone wrong with the thermosat in the unit and it just kept on heating till it was super hot and scorched everything and melted/and burnt the thread. I loved the steam ... but I feel I have given this manufacture the benifit of the doubt with the second purchase.
Never again. Both were the high end iron.
Now I am using my cheap $10 iron and a spray/mist bottle. It is much much light in weight ... which helps on the carple tunnel.
Look for a good sole plate , avoid the teflon ( you can not get occasional fusible off the bottom).