I don't know if those things work but an ear infection is inside the ear behind the ear drum, so it won't be visably red.
sometimes there are no symptoms. but fussiness in general trouble sleeping , loss of appetite , or fever can be signs of an ear infection , here's the list from webmd.com
Ear Infections - Symptoms
Symptoms of a middle ear infection (acute otitis media) often start 2 to 7 days after a cold or other upper respiratory infection. Symptoms of an ear infection may include:
* Ear pain (mild to severe). Babies often pull or tug at their ears when they have an earache.
* Fever.
* Drainage from the ear that is thick and yellow or bloody. If this occurs, the eardrum has probably burst (ruptured). The hole in the eardrum often heals by itself in a few weeks.
* Loss of appetite, vomiting, and grumpy behavior.
* Trouble sleeping.
* Trouble hearing.
Symptoms of fluid buildup may include:
* Popping, ringing, or a feeling of fullness or pressure in the ear. Children often have trouble describing this feeling. Children may rub their ears trying to relieve pressure.
* Loss of hearing. Children with hearing loss may seem dreamy or inattentive, or they may appear grumpy or cranky.
* Balance problems and dizziness.
Some children don't have any symptoms with this condition.