Hello everyone, I was wondering if anyone else has had a problem with acetaldehyde production in Trangia 25/27 stoves using ethanol. I would like to hear what other people have done to remedy this problem. Because of the upper windscreen, the Trangia vents the exhaust gasses very close to the upper lip of the saucepan. When boiling or simmering without a lid over the sauce pan, acetaldehyde (being miscible) will find its way into the water/food. There is the characteristic flavor/odor that would be familiar to beer and wine makers. Granted the concentration of acetaldehyde is well below harmful levels, I find the taste off-putting for certain foods (e.g. steel cut oatmeal). Now when I cook using the sauce pans, I have to keep the lid on except when stirring (which increases the likelihood of boil over without careful simmer-control). Acetaldehyde is not a problem with the fry pan given the higher cooking temperatures and the use of oil instead of water. Now the burner is over 15 years old and has had some “rusty” alcohol go through it on one occasion (there was no other alcohol available). I have washed out the burner, but I have no doubt that there are iron particles entrapped in the wick. Could that be boosting acetaldehyde production? The one test, I suppose, is to buy a new burner and see if the issue persists. I would prefer to use ethanol since I use the stove around kids. I am very fond of the Trangia and appreciate its simplicity and tranquility over my multi-fuel stove. Basically I am just trying to maximize my enjoyment with the stove and would appreciate any suggestions. Thank you!