Every time I have cleaned my firearms, I've always just cleaned around it. This past time, I let the clp soak on the slide for a little longer than normal, and really cleaned around the firing pin block with a qtip. I noticed it was so clean it was extremely easy to depress the spring for the firing pin block. Previous times I had cleaned, it basically seemed stuck stationary. Is it normal for it to move so freely, was it just gunked up previously?