I bought the pack of 4 CKM sensors…
I bought the pack of 4 CKM sensors (ketones). The first sensor broke physically (it felt apart upon application). The second sensor was OK physically - I was able to apply it, but it only stayed connected to the mobile app for 5 minutes and then "retired" itself asking for replacement. The 3rd sensor is working just fine for 2 days now. I wrote to support asking for help. No one replies. It's been almost a week and I haven't heard anything back. Write now Im not going to buy anything from them, as I lost 140 Euros on two faulty sensors that no one is willing to replace.