I had a day of hypers early December, until I spotted a cracked NovoMix 30 cartridge.
Then last week, more hypers, no crack, but the cartridge was clearly not injecting. I noticed that there was a "blowback" of some blood into the suspension. Never seen that before.
I informed the Pharmacist and my surgery. The Pharmacist sent a photo of the cartridge and a report, to her yellow-card site.
This seems to be a quality control issue, which has been evident for some time. If so, it's about time Novo Insulins sorted it out.
It means I cannot rely on my Insulin system when I travel away from home, unless I take some spare cartridges with me.