I just finished my first (very simple) stencil!! I'm about to heat set it but I just noticed the bottle of textile medium said to heat set then allow to dry for 7 days. Is this really necessary?? It seems a bit extreme to me especially since I'm really eager to wear my new shirt!! Does anyone actually wait 7 days to wear their creations?? I'm willing to wait if it might ruin my shirt..otherwise I wanna wear it tomorrow!!