I've made charcloth on the gas stove in the kitchen before. But I was only using that Altoids tin. So the size was small, and the amount of smoke was small. I also made sure to get the smoke coming out the hole burning right away. It still left that ... haze ... throughout the kitchen.
I've also used the white gas camp stove outside, and made it in my woodstove. The woodstove worked well, but I had let it burn down somewhat, to a nice bed of coals first.
I still haven't tried that one-strip-of-cloth at a time method that was talked about after the Moot. Hold a strip of cloth up and light it. Let it burn till it is all glowing. Then carefully lay it down on the pages of an old book or magazine, and gently close that book/mag to "smother" the fire. After it is fully cooled, open the pages and take out your strip of charcloth. Sounds like a quick/simple method to make a little at a time. Yeah, I need to try that method - outside of course.
I have made charcloth with Karl Koster's method. Wrap strips of cloth around the end of a green stick, and hold it in your campfire - till the whole outside is glowing. Then carefully bury it in dirt/sand to "smother" the fire. When cool, carefully dig it up. The outside layer will probably be ... too charred. But as you unroll it, you will get to good charcloth. After you unroll a bunch in use, the cloth will start to look more brown than black - not charred enough. So then just hold it over the fire to "burn" some more, and then bury in the dirt/sand again. Leave the stick in the center of the roll when you store it in a pouch. It helps stiffen and protect the charcloth. Just clip the green stick off close to the cloth. And keeping it in some sort of pouch/bag helps keep black crud from getting over everything else.
Just another possible method. But it also doesn't require that ... tin ... to make it.
Mikey - that grumpy ol' German blacksmith out in the Hinterlands
p.s. Charcloth is best made in small, loosely packed quantities. You get better and more even penetration of the heat to turn the cloth into charcoal that way.