I recently burned an AT J180T with normal motor function. When I attempted to clean the motor hardware, after it cooled, I discovered that the phenolic liner was essentially welded or melted to the inside of the motor casing and can not be removed. I did use a generous coating of Super Lube on the outside of the liner when I assembled the motor about an hour before the flight and I'm certain that I followed the assembly instructions correctly. I've never had this happen before and was wondering if anybody else has. Does anybody know any procedure for removing the liner in this situation without damaging the hardware or am I just going to have to buy a new 54/852 case?