Just another method germinating seeds. I just tried once and it worked nice. Here is now my second try with this method. You need living sphagnum for this and you have to chop it very fine. So it won't start overgrowing the seeds. Living sphagnum is anti-fungicide and no algae will grow on it.
Just put the fine chopped living sphagnum in a petri-dish, close it and open once a day the petri-dish to let some fresh air come in.