Removing it is quite difficult but cleaning it is easy. Separate the stock from the rest of the gun. Get an aerosol can of brake cleaning fluid from an auto parts store and, using the extension squirter attached to the can, spray the floating chamber. I don't know what is in that stuff but it cuts through the gunk quite well. It's not bad for cleaning the bore, either. Keep it away from wood, it will strip off varnish and most anything else, leaving a mess. Be sure to do all of this outdoors. That stuff STINKS!