I recently bought a new infared grill, I love it! I had to exchange my propane tank, because it was out of date and they would not refill it. So I exchanged it and got one of these new bottles and found that after using it 2 times it does not flow enough gas to the burners and the bottle was still full. So I took it back and exchanged it for another and now have the same problem again. I read that if you throw it up in the air on your lawn it will unstick the float or what ever the hell makes this thing not work. My old bottle never did this. Does anyone know how to correct this problem?