Feel pretty stupid here but I have read MANY posts that say to remove the coil cover and clean the coil of debris to prevent falsing. HOW is this done...with a crowbar? I can't budge my coil cover from my cz70pro or my cz7. Seriously...I can't get either of them to move at all. What are some methods to try...other than a little common sense...which I apparantly don't have?