Your daughter has probably developed Otitis media with effusion which sometimes complicates prolonged colds in children. This condition impliescollection of fluid in the middle ear cavity thus impairing hearingtemporarily. You could try giving her a decongestant like Sinarest AF 2/3tsf. three times a day for 2 weeks and put some nose drops like OtrivinPediatric nose drops 1-2 drops in each nostril twice a day to let the earfluid spontaneously drain in to the nose. You could also give her onechewing gum a day to open up the eustachian tube a draining channel thatruns between the middle ear and the nasal cavity. This condition is selflimited but if it does not get better in 3 months on its own then doctorsadvise removal of the adenoids and insertion of ventilating tubes calledgrommets in the ear