Another good tip to keep your drains clean and running; Pour about a cup full of Baking Soda on/in the drain, followed by approx. 4 Cups of cheap White Vinegar ( fun Volcano effect!:-).), let sit for 10+ minutes, then let water run to clear through pipes. Do this once a month and you should never have a problem with clogged or smelly drains again.:-).
It may cause the drain to be clogged, because nothing will be able to pass through there. You can get rid of the clog by boiling some hot water and pouring it down the drain, so that the Vaseline will easily melt.