The siphon of the sink has very quickly an accumulation of deposit of skins, hair. And this will generate a foul-smelling gelatinous mass where bacteria will proliferate. It is then necessary to constantly clean the bung of the sink and to throw this muddy jelly in the toilets or in the trash.
There is an alternative to quickly get rid of excess hair before it clogs the sink.
Simply replace the siphon with a grid filter. The disadvantage of this technique is that the grime of the skin may stick momentarily to the pipes and it is then necessary to use a DesTop type cleaning product.
This filter is also compatible for the bath and the shower. Good and resistant, it lasts a long time.