edited to add: Amy Chomas emailed me back with an update when I told her I'd be blogging about her products. She recommends to NOT leave the pens in the holders in the machine when not in use. Somehow some pens drip and make a mess of the machine. That would be an unpleasant surprise. I'm sure that markers would just dry out if left in there and that would be a waste.
There's 3 more coming, stay tuned!