first of all, you need a thermometer/hygrometer which you can get pretty cheap at walmart. then measure to see what the himudity is.(it is supposed to be between 50-60%). then if it is low, put the saran wrap over part of the top and leave it their, as long as you dont cover more then about 2/3. you can leave that on all the time. thats what i do. see how that works.