Glue ear is one of the most common childhood illnesses. Children under the age of five are the largest group affected, though for some it can persist into adolescence. Glue Ear in Adults may also caught. For ears to work properly the middle ear needs to be kept full of air. The eustachian tube, which usually does this, runs from the middle ear to the back of the throat. In children this tube is not as vertical and wide as it will be when they get older and as a result doesn’t work as well.