I'm starting with the "garden incinerator + smoke generator tube" system. My first attempt was cheese, and I got a fair bit of melting, thick billowing smoke, and a short burn time. I figured that it was burning too hot, obviously, and put it down to excessive air flow. I'd taped over the holes in the sides of the bin, with aluminium tape, and therefore, for my second attempt ( to smoke some chillies), I taped up five of the holes in the bottom, leaving five open. This time I also inserted my oven probe thermometer. The temperature is still getting up to 35C. Too hot still. Should I close off more holes, presumably the smoke generator tube needs some air, so I can't close them all off? The ambient afternoon temperature today is 14C.