Most of the products at the supermarket (DH has tried a few on his iron) either clog the steam holes or do nothing. so they take even more work than a little bit of elbow grease (which really is not that much - trust me, I am lazy!!) and a tiny bit of heat with a damp scourer (the green or blue ones work best - No steel wool).

I turn on the iron, then grab my damp scourere and while the iron warms up I clean it. only takes 2 minutes, and if it gets too hot turn the iron off, and when it cools enough to touch but is still warm start scrubbing again.