Just started using these and have a couple of questions: Can I put cigars on top of the packs? Will this damage the sticks or impede the packs' abilites to control humidity? Does it matter where in the humi the packs are placed? If I put them on the top shelf, they would take up a lot less cigar storgage space. I think I read here once that humidity rises....good idea or bad to place on top shelf? Thanks.