Talc does not cause clogged pores lol.... Clients wash it off anyways in the shower the day after. Dunno, where she's getting the, encourages ingrowing hairs from either to be honest. I only use talc when doing hot wax. We were always taught to do that becuase it dries the hair up quicker after using pre wax cleanser. But sometimes I think it actually leaves a slippery residue as well if you use too much. Talc is after all used for Swedish massage for slip. I suspect its more down to personal preference, and you'll find what's best for you. But I understand that when training you kind of listen to your tutor becuase you want to pass as quick and painlessly as possible lol.... I must say I do like using it for under arms and bikinis. It seems to grip the hair better and you don't have to go back in with another layer to tidy up.