I have a couple questions about shuttle humidification. First, does anyone know the optimal level of humidity to keep shuttles? I have seen plenty of information regarding how to humidify, but nothing that says what the best humidity is. Second, has anyone used or considered using cigar humidification beads to maintain humidity in tubes? I was thinking of picking up some and throwing them in a mesh bag and dropping that into shuttle tubes. They are supposed to maintain a relative humidity of about 70% - I just want to know if that is too high or too low.