My father in law, Bill, who knows far more than me in areas of physics and stuff, suggested I put some aluminum foil on the inside roof just above the bulb- just as a safeguard. Next I place a 5cm thick piece of sponge in the bottom and fill to top of it. I fold them into a tight bundle and push them inside one of those orange plastic knit bags that hold oranges. I twist the top and place the whole thing into another of these bags before lying it gently into the container. Thermometer in place- temp varies between 110 and 130 F Light goes on.
Lid is closed.
Each day I open up in the morning and evening, unwrap, turn the leaves- just in case some are drier than others. Keep it in there for the full 4 weeks, spraying with lotion if it gets too dry. I normally rip the stems out after a few weeks. My last batch I soaked the lot it rum and treacle, then squished it in the press I made. I dried it by the fire and cut it in the food processor.