This touching of ear on a regular basis is just a habit with lots of children and does not warrant any serious apprehension.

Madam cleaning kids ears is not advisable,please don't put buds or cotton to clean ears.Ears will dry on their own and wax will come out on its own.It can cause damage to ears walls and ear drum.You might have damaged the ear walls when you were cleaning and because of which he might be having itching.Kindly consult directly .

It could be habitual thing as well if its just one ear Take a consult to understand better