I've had my Monsoon for quite a while now and it always has functioned flawlessly before, but I charged it up a couple days ago and took it out for some shooting and it would not run. If I dry fire it it resets perfectly but with a magazine and pellets it's one shot and then nothing. I need to pull the bolt back and let it snap forward and then get another shot. I am assuming something needs cleaning, but where do I start? all ideas will be greatly appreciated!