They're good for using a couple of times, then putting it away at the back of a cupboard. This is so that, in years to come, children will come across it and ask what it's for.
Going over clothes donated to a charity shop, so that the place doesn't pong. If you don't need it, find a charity shop that pongs a bit, and donate it!
Very good for breaking static that keeps fluff and pet hairs stuck to carpets and upholstery. A pass or two with the steamer, let it cool then hoover and some very unexpected muck is released.
I use mine every week for kitchen, bathroom and hall floors. Use with just water. would add detergent if using on carpet. Great for defrosting freezer.
Be careful with stains - the heat may set the stain rather than loosen it. Treat carpet stains with cold water and detergent in solution and blot dry with lots of towels.