I think the name of the game is avoiding contamination through the entire process.

I've had so many unsuccessful indoor grows that

i've resorted to fruting outdoors exclusively. This is limited to the summer months only so careful planning is necessary.

   The spawn bags are fantastic for the first phase because they are sealed from air exposure. the fruiting stage gets tricky once you have to allow for fresh air. The question really becomes where in your house is clean enough to prevent mold from contaminating the grow? No matter what an  indoor grow is a tough challenge that takes alot of trial and error to perfect.

   Mushroom growing is a satisfying and spiritual pursuit that's well worth the effort.

   Strange and wonderful things happen when you align yourself as friend and cultivator of the mushroom.