I have read to dunk your cakes and add a little vermiculite before spawn. I have no extra verm is this gonna hurt me?
Not at all.
The extra verm casing layer is for extra moisture.
So that being said.
You are going to have to FAE [ fresh air exchange ] and MIST Your terrarium more often.
Perhaps giving Your cakes a second dunk after pins have started to form?
Just so it gives THAT MUCH more nutes and energy to grow FATTY FRUITS !!!!
Keeping the humidity and moisture up is key.
I have successfully fruited many psychedelic mushrooms with NO VERM CASING LAYER.
However, vermiculite is extremely cheap... Why don't You just run to the local gardening store and pick some up?
It wouldnt hurt at all....
Living beings love water / moisture... especially mushrooms
.