My ED4400W dryer is not drying clothes properly. Medium size load has been in for 1-1/2 hrs, and although the clothes are warm, they are not even close to dry. There is some lint in the lint basket, but not what there usually would be. Some lint is evident in the drum, on the door and on the clothes. I'm assuming there's a blockage somewhere, but I'm not sure where to look. Can you please assist me? Thank you.