Yep, I have one of those too - but a spray bottle works too! It's just a blast of steam Dave - not a perpetual steam release.
mcnerd - I bet your machine is pretty clean and would work fine for this. it doesn't "suck in" the stuff you are cleaning - it just gives it a dose of steam to help in the cleaning process.
"Count yourself...you ain't so many" - quote from Buck's Daddy