A lit cigarette smoulders at roughly 700-800F (370-430C) between puffs, and the glowing tip can reach 1300-1650F (700-900C) during a hard drag (source)
They were careful with the abuse, because he couldnt get bruises, he couldnt have sick days and so on, because he had to be on the set five days a week for however many weeks a year his seasons lasted, Geoffrey details
in particular, cigarettes served as a more efficient vehicle for the absorption of nicotine and a less expensive form of tobacco
It is not about showing intensity
Whether youre trying to get the smell of sweat, urine, mold, or dust out of your mattress, you can generally remove odors by: Removing and washing all your bedding Spot-cleaning noticeable stains and spills Sprinkling baking soda or cornstarch with or without essential oils over the surface and leaving it for several hours Vacuuming up all baking soda and cornstarch Applying a diluted vinegar solution or enzyme cleaner if smells persist Letting the mattress air dry completely in the sun If these steps dont refresh your mattress, it may be time to consider buying a new one