Originally Posted by
SherylM
There was a build-up of this white mineral-y crud that kept coming out of the holes, probably because I never emptied it after I used it.
Try this: empty all water, fill with vinegar and let it sit for a couple of days. Empty the vinegar, fill with water and turn on. When it's hot, set it to steam and hold it vertical over the sink. Let it actively steam for a few minutes. Dump the rest out and you should be good to go. If the build-up is really bad, you might soak it longer, or repeat the process. You can also try heating the vinegar in the iron, steam it out, then rinse with water.