Trimming Java Moss

Do anybody know the best way to trim java moss, the problem is catching all the bits that float to the bottom of the tank and clog the filter. If i use the siphon it clogs up and i cant really hold it by the hand because i have loads of shrimp in the moss.

The only way i can do it is hold the moss with the tweezers while cutting but that takes forever to do.

My question is do anybody on here have java moss and how do you catch the trimmings.