[HotChef]

and works every time with very little effort.
bought me from moulinex a yogurtmaker. has 6 little glassjars, 200 ml each, with screwtop. machine has a timer, but there are also models without.
at the store buy a very good, plain, Bulgarian type yogurt.
put into each glass a coffee spoon full of yogurt. i than fill it up with 6% milk, no diat for us.
turn it on, the machine keeps the temperature of about 40C and after 8-9h yoghurt is done. close the jars and store the yogurt in the refridgerator.
the last glass you use than always as a 'starter' if you want to make the next patch.
if after some time (10-15 times) the yogurt becomes weaker, just buy a new jogurt and start all over again.
The little yogurtmaker was (here in Moscow) 30 $. it makes now yogurt once a week since 5 years with no hassles.
want to have flavored yogurt or honey. just put one spoon full of whatever you want to into the glasses and than the yogurt on top and milk and the rest...