Colorsonic Permanent Hair Color Cartridge

As a dark brunette who has been needing to cover her grays since 16 years old, I could not wait to try this! Going to the salon every 3 weeks can be tiresome and needless to say, expensive! So I jumped on the at home hair color train years and years ago. I buy pro color and developer on Amazon, measure everything, mix it up and then spend close to 2 hours from start to finish applying, processing and rinsing.. Doing this every 3 weeks has also been tiresome and most times, I don't have the time!! So when Colorsonic was introduced I knew I had to try it. From the moment I started application to the time I fully rinsed, it was only 35 minutes!!! The device was super simple to prime and get started. Then, all you do is literally brush your roots... Transparently was a tiny bit skeptical about the saturation of color and if it truly saturated my roots like I do when I paint my roots... But I was proven wrong, my roots were saturated!! It looked like I painted my roots myself. After application, the device showed I still had a 3/4 full cartridge! I could go on and on about this device, the process and how simple and efficient it has made my at home hair color. I am truly blown away and so thankful to have found something that makes my busy life that much more simple! Gone are the days that you will see any grays in my hair line and that makes me, a super self conscious about my grays at the age of 36, so happy!!! This is a must buy, must try device and coloring system. Cannot recommend enough!!

Is there ANYONE out there that has re-used a cartridge? I have used 3 cartridges now for root touch-up. When I insert the (used) cartridge, the device tells me that the cartridge is more than half full. But when I start it, only the white developer comes out, no color. Same thing happened 3 times with 3 different cartridges, However, if I use a NEW, UNUSED cartridge, it works like it should. Not sure if the level indicator lights don‘t work as described, or the color dries up once seal is opened. Anyone else having this issue? Also I have spent a long time on the phone with customer service. I got variable answers that did not help.