Glue in my ear

Infection of the middle ear can lead to a condition commonly called ‘glue ear’. 

MY three-year-old has been having problems understanding me recently. I would call her and she would not respond. I would tell her to do something, and she would just go on playing with her toys. At first I thought she was just being rude and disobedient, and I felt like disciplining her. But my mother-in-law suggested taking her to a doctor. The doctor did an ear examination and diagnosed ‘glue ear’. What is glue ear?