Perhaps the hardest achievement in the game, aside from the 48 golds. This level was a major pain for me.
All I can say is take it easy on the first buttons to calm down the fall (so your rail cart doesn't go bouncing everywhere, spilling liquids) and memorize the final balancing part.
You need to have the seesaw facing the "wrong" direction from flamethrowers in order to be able to swing your cauldron over to it, so you want to tilt the seesaw INTO the ice streams and then quickly start swinging your cauldron right to hit those flamethrowers. It's hard to explain but hopefully you'll see what I mean when you play; my biggest mistake was trying to shy away from the ice constantly which ended up in me missing the flamethrowers and everything falling apart in that final bit. You simply can't play it safe.
Oh, and don't make the mistake I made on one of my near-perfect runs; I tried to rush the very end of the balancing bit without using the flamethrowers at the bottom and skipping the final seesaw-balancing bit... Doesn't work. Your liquid cools down on the last downhill.
Incredibly hard and frustrating level, at least for me. I'm including a video so you can get some hints, but it really all boils down to perfecting that last stretch of the level. Video credit goes to Playstationworld.
My notes on the video:
- He crashes into the buttons a little too violently. You can drop much more safely than that by hitting the buttons with less momentum.
- He slows down almost completely to smash the wall; that's not necessary at all. Just go full speed. The impact even reignites your liquid a tiny bit.
- He's not using the seesaws correctly in the final bit. Look at how the seesaw is tilted on the second flamethrower and that's how it needs to be for all of them, for a perfect, safe run. Don't try to do what he's doing, which is basically just freestyling the balancing and hoping his liquid is warm enough to last the whole way through.