This will be my third time breaking the gun down for cleaning, just got back from the range (300 rounds). All was going well until I tried to remove the slide. I was only able to get it to move about 3/4 of an inch forward, and it got stuck. I was able to slide it back and repeat, same thing. This last time I tried it, the slide got stuck about 1/8 of an inch forward, trigger is locked back and will not reset, and I cannot move the slide at all, forwards or backwards. The first two times I took it down for cleaning, no problems. Any advice woule be great.