Laura, most newbies are so worried that their orchids need so much humiidity that the bathroom or over the kitchen sink is the first place they put them. But humidity is the least of their needs. What they need above all is light. Dendrobiums need lots of light. They need less than a cattleya but more than a phalaenopsis. Phals are low light orchids and cattleyas are high light orchids, and your dendrobium falls in between.