Originally Posted by
Mitch's mom
Fill the Iron with plain water. Set it over the sink or hold it over the sink. Set it on full heat and steam and let it steam until it is empty then repeat. That will be the only way to get it cleared of the starch.
This is how the instruction book says to clean as well. I'm sure you'll need to repeat this process more than a few times but it should work fine. I've had to do this a couple of times when I get mineral build up (despite using distilled water as called for) and after a few repeats it finally runs clear.