I did that with my first cartridge, but the fibres ended up touching the atomiser which isn't good!
(Yeah, just 1 post to go before I'm out of the crib)
I was worried about that as well but I looked at the main board and there's a thread about how the atomiser works with a picture and diagramme showing the composition. It seems that the metal mesh you can see down the end of the atomiser is a sort of sponge that is in front of the actual heater coil/wicking packing (hope you know what I mean by that). As I understand it, the metal sponge holds the juice and delivers it to the heater coil. The luice in the sponge also contributes to the vapour production.
If I've any of this wrong, I hope that someone will correct me.