I have a Micro Welder Super A model. I have cleaned out the Hydrogen Cell and Atomiser. I topped up cell with correct mixture, and put Meth and acetone in the Atomiser. The flame it produce was very small with a new No. 18 nozzle. Not much heat or power. I put the other recommended fluid into Atomiser ( MEK) and the torch produces more flame, but the tip goes Red hot and it blows back. Anyone using these machines. They are for Silver Soldering on Jewelry mostly.