Google suggests it could be because they were fried for too long or at too low a temperature, and this leaves too little moisture for adhesion. I imagine sitting under warming lamps (as I've often seen in cafeterias) might have similar impact.Having brought it up, I now wonder WHY Dry Fry syndrome occurs.
I can believe both, but I know the second wasn’t a factor for me back in school. Their fries were done in small batches, essentially cooked to order.Google suggests it could be because they were fried for too long or at too low a temperature, and this leaves too little moisture for adhesion. I imagine sitting under warming lamps (as I've often seen in cafeterias) might have similar impact.