case cleaning

Anybody have any problems with their tumbler not 'tumbling' properly? I have tried mine with all different amounts of brass, pins and water but it never seems to get the tumbling action going properly, the brass and pins just sit at the bottom of the container as it goes round instead of up the...

Does anyone have any experience of this process? I have tried Ultrasonic cleaning using specific Cartridge Case cleaner from APL chemicals, but the cases came out tarnished and oxidised looking terrible, (they might have been clean inside but your couldn't tell. I asked APL they sent me a...