No joke. It is good stuff though.

Like I said, I was skeptical. But there seemed to be so many people here and other places that mentioned it as being great, I had to try it. My machine went from junk to jewel. Seriously, I was thinking of parting it out if it did not work right. I was lucky enough to get a spray can of it at an Estate Sale for cheap, so it was a no brainer.
~G~

I'm not crazy about spray cans of the stuff - I use a little drip bottle - does the job.

I didn't have the choice but for what I needed it for the spray was a good choice. I needed to get back into a place that was hard to reach and it might have blown out some of the bad stuff in the process too.
~G~

I use the long skinny straw thing and it reaches about anywhere I need it to go.