Our yoghurt maker works really well with soya milk and although the consistency is a little different to cow's milk, it is still really lovely.
However tempting, resist the urge to remove the lid and check on the yoghurt, this will have a potentially negative effect on the end result. We set the yoghurt on to incubate last thing at night.
By adding the dried milk, this makes the yoghurt creamier.
Do not add anything to the yoghurt before or during incubating such as sugar and fruit, this should all be done afterwards. Yoghurt should last about 4 days in a sealed container in the fridge.