Is there a way to adjust the air flowing into it? Can you post a picture? Ideally you want an all blue flame, a small amount of yellow is ok but that's what makes the soot.
I have one of these, works great.
http://thermoworks.com/products/low_cost/rt600c.html
Edit: not sure if you're looking for a handheld or a bulkhead mountable style.
Just bought another new 5 gallon from AIH. It arrived with a small dent thanks to UPS but looks great otherwise. I'll probably end up with a few more of these.