Hello! I'm wondering if anyone else has had this problem. I've used meths in the Trangia for years without issue but last time I was rushing for a bottle there was none in the shop, but they did have this bio-ethanol from Vango. Alcohol is alcohol right? Or so I thought and picked it up. I'd used it a couple of times and maybe it was slightly different but not in any way I really registered, well, it registered this time! After running the stove on full for a while I attempted to use the simmer ring, it didn't work, it really didn't work. In fact the flames were licking all the way up past the entire stove and higher than the windshield I place around my Trangia Mini! When I removed the pan I could clearly see the fuel boiling in the burner so it's no wonder it was a bit... energetic? I have no recollection of this level of eruption with meths! I've had one conversation online with someone who has experienced the same and as a result has moved on to a different bio-ethanol supplier who may have a subtly different blend and seems to have solved the problem for them. I assume lots of people simply run the Trangia burner on full until they are done and then snuff out, so it may not have caused them issues but as I often cook, for a long period, it may be a problem unique to me. Slow and low hasn't been an issue in the past but as a result of the runaway burning I got through a lot of fuel! It's not the cost that is the issue but the bulk. nearly 400ml of fuel for two meals and a coffee! Never did that much with meths.