Unclogging a Drain

Firstly, boil some water.  While this is being done, pour a bunch of bicarbonate of soda (also known as baking soda) into the drain.  I use enough to go in to the plughole and pretty much cover it.

Then pour on some vinegar, an amount a bit less than the baking soda.  Some places suggest white vinegar but I find malt vinegar works just as well.  You'll see it all start to work, with the mixture bubbling up nicely and satisfactorily!  This is the clog breaking down.

Next add some salt on top of the vinegar to make it even more foamy and work even better.

Let it sit for a while to gurgle away - 15 minutes or so, until you're ready to clear it all out by pouring in the boiled water.  This should do the trick easily and naturally.  And look!  Pretty sink with no clogs, environmentally-friendly and naturally.

If necessary, repeat for those more stubborn clogs.