That's very interesting. I have never seen that before but generally, we used all the wells in our gel cards so we never really had the opportunity to respin them. I do remember getting some weak to 1+ reactions, that when repeated, were negative on the repeat. I wonder if real small fibrin pieces could be responsible. I'm not using gel at my facility currently but we are discussing it's use so I will have to watch for this when we do get it.