Our ears ans nose have hairs inside them to sweep out the dirt naturally. Unless my child's nose is block due to being sick or filled with dried mucus, I wouldn't bother. Same goes to the ears. Clean the outer ear with wet cloth or just gently clean the outer area paying attention to the folds during shower. Do not introduce any water or cotton buds or attempt to dig the ear. High risk for ear infection or ear wax impacting inside the ear canal or trauma inside the ear canal.
Priscilla Lee