Clean the sink plug in the dishwasher
Every now and then you have to subject all the pegs to a cleansing. With patience and old toothbrush you can not reach all places well. Therefore, I pack the "family plug" after thorough pre-washing and hair removal in the dishwasher. After that, they are really clean.
In the meantime, the drains clean almost by itself, as I fill in hot soda water. All accessible parts are briefly cleaned with an old bottle brush. This regular cleaning prevents drainage Mief, as well as clogging of the siphons.