Experience with JSP propane/air torch?

Some advice please. Does anyone out there have any experience with a
JSP propane/ air torch? (Otto Frei sells it as the EZ torch) I have
one that is not working as well as it did at first and I am
wondering if it is dirty - or should I just replace it? If I replace
it, I don’t know what to get as I really like the idea of portable
propane. I do metalwork sporadically and don’t like the idea of a
large tank in my house. I also travel with my tools at times. Any
advice or suggestions? Thanks in advance, I know that there are lots
of threads out there about torches, but now this specific one.

Ellen Harris, novice