JuneC
I take a Mr. Clean sponge, wet it and rub it on the iron while it is still quite hot. Also if it gets too built up I pour a little vinegar into an old pie tin and again rub the iron with the Mr.Clean sponge or setting the iron right in the pan for a little while. The cause is not waiting for the spray starch to partially dry or get soaked into the fabric. I have always been short on patience so needless to say I have to clean my iron.
Suzy