The ball on top of the bar of my belly piercing seems to be caked with blood underneath and is stuck to my skin. I've cleaned it and it didnt loosen the blood. what should i do?

Well I would suggest taking a bath and soaking the piercing for a while that will loosen the blood build up on the barbell. Then before exiting the tub use the shower to rinse the piercing and your navel out with warm running water. Cleaning is a daily thing that can be forgotten when it comes to navel piercings.