i bet it was the soap. i added too much and it became frothy.
i'm still not sure about what causes the bubbles in wax. let this thread serve as a place to propose and test theories!
I suspect the water in the bubbles has been heated at the bottom and can't cool off as easily when trapped in a bubble. My p/y colossus was doing that. It looked like a Galileo thermometer; the bubbles would just hang there forever.
I also have a '73 aristocrat that wasn't bubbly until I changed the fluid. It gets to the point that it almost looks like green foam, but the flow is still great. I'm wondering if it's the dish soap I used for surfactant. I used Joy soap. Someday when I break down and buy a hydrometer I'll swap the fluid again and use a different soap to see what difference that makes.
Anyone ever get any resolution with this? I've got a couple of lavas that are really bubbly. I know it can't be heat (in my case) as I have one that does it in the first 30 mins. And I know it can't be the wax being shot since it hasn't been run that much.
Your wax is melting in 30 minutes? That sounds like you might be running it a bit hot.