Nerdabetic's video could've just solved my Feestyle Libre issue 

Great video mate

Read the small prints indeed. I'm T1D since half a century, and I was told early on about the interaction of vit-C with glucose measurements. It may also be mentioned on the vitamin C patient leaflet. Yes, dexcon is good - i started using the platinum version about 10 years ago, then moved to medtronic which was really bad, and now I'm recently back on dexcom G6 with roche accu-chek pump and DBLG1. The system works great, but requires a separate controller (connected to internet). All these companies require your data to be uploaded to their servers sadly. I wish I could specify my own server url and self-host my data collection.