just make sure you have soaked the perlite..... it keeps humidity up for the process of fruiting..... as for fanning the chamber out, yes, its DEFINITELY a good idea to, dont worry about mold or other spores when you fan, the mycelium are already established enough to fight off anything.... I've grown mushrooms before, its really easy.... and if you wanna increase your yeilds, after you have picked off all the mature mushrooms (right when the veil brakes), youll have some buttons left over, take the cake and soak in COOL water for 24 hours and then roll your cakes GENTLY in vermiculite and place in the fruiting chamber again, more mushies will grow... ive done this and it work every time... after those mushies grow, you can keep soing the water bath and verm until all the nutrients run out..... I hope this is helpful