I've never found a cigar that tastes as good on relighting after more than an hour or two. For the same reason I don't put burnt cigars in my humidor I would not put a single burnt cigar in a tube and expect that it would come out as i left it. The obnoxious odours would be even more intense in a small area, I would leave the cigar out and then just knock the ash off when I go back and hope for the best.