
Complete nonsense; hairy ear canals should definitely be plucked. Putting oil down will only make clogged ears worse and if the eardrums are damaged (surprisingly common) could do a lot of harm.
And although thornit contains a certain amount of talc that is just a carrier for the other chemicals (zinc oxide, iodoform and boric acid) which are the ones that are effective. That said, Thornit should only be used
very sparingly and not actually put down the ear canal, because if there is a bad infection it simply forms a glue with the ear discharge and completely clogs up the ear canal, meaning sedation is often needed to flush it out.