my curado seems to be having a hard time when pressing the thumb bar. its been getting increasingly harder to press down. it will go for awhile with little problem then all of a sudden i have to press quite hard to cast then sometimes it will stay down and loose and floppy after a cast and i have to lift it and it clicks in ive opened it up and cant find anything broken or damaged any ideas???? last thing is when realling you can hear the gears inside ?