Just as some anecdotal information, I bought a litre of bio ethanol from go outdoors at the weekend.
I did a trial run at the weekend and couldn't believe how sooty it made the pan compared to the Wilkinsons methane I've been using up to now.
I was really disappointed as I had thought it would burn cleaner!
Not sure why it seems so much dirtier?
I am surprised if its the proper Fuel4 Bio-Ethanol Spirit for camping n stuff? I've heard good reviews, it is supposed to be virtually soot free, But yea I sort of had the same problem with the B&Q stuff but found that starting with an empty burner that has been burnt dry. I flushed out the burner using warm bio ethanol ( IE.fill with bio Light let bloom extinguish discard repeat until it runs clear) the purple that's in meth seems to be left behind & becomes concentrated over time, what comes out looks like exactly like purple meth the sooting was reduced considerably, Although B&Q bio is still a bit sooty I didn't think it as sooty as the meth I had been using
As suggested by Buadhach
"The bio ethanol sold by B&Q is intended for use in the spirit burning decor fireplaces they sell. Maybe the sooting complained of is caused by an additive designed to produce cheery yellow flames"
Good point, I hadn't considered that, possibly you are right?
Buadhach also suggests "Maybe it would be worthwhile adding between 5% to 10% water to the bio ethanol to see if it has the same soot reducing property as it is alleged to have with blue meths. I'm only sayin'."
I personally favour undiluted Fuel..... Why? Well, from a scientific view point water has a very high specific heat, higher than meths. What this means is that not only are the fuels less powerful per gram, but the fuel also needs to heat up and evaporate the water added to the fuel!
This wastes precious energy which could be used to heat the food or water in the pan.
The soot getting in your kit problem? The pot will go black sure but once a black sooty patina has formed a quick wipe with a wet cloth before you pack and carry removes the excess soot after each use and the rest is pretty hard to shift so the black doesn't transfer & won't mark anything.
& I too also, I'm only sayin'.