If you thought that cotton swabs can really clean your ears, then you are wrong. The swab can be extremely dangerous, so doctors advised to be fully phased out of using.
Namely, using of sticks, the cerumen from the ears (yellow, resinous compound) are increasingly pushing towards the ear canal, which can damage the eardrum, and thus at the hearing.
Of course, this does not mean that the hygiene of the ears should not exist, but that should be applied otherwise. ENT advise that top cotton towel only slightly to clear the ear and towel as sticks and not be pushed into the ear.