I tried to post this in the eRoll thread but I'm not allowed to post there yet. I got my eRoll yesterday and I'm loving it but I have one question. The manual says to never let the juice level get below 10%. How do I know where that level is? I think I can see a line through the side window but a significant portion of the cartridge is inside of the cone. Should I just refill it when the line of fluid gets down below the top of the cone? I included an image of the cartridge if you could indicate how low is safe. Thanks. Great forum.

