I’m having a hard time getting enough blood out of my finger, what do I do? COR January 19, 2021 16:46 Updated Try the using a different finger. We recommend the middle, ring or pinky finger. When drawing blood from your finger, lightly apply pressure to your finger to assist the blood flow. If you are having difficulty drawing blood, try a second lancet. Related articles How do I know when I have enough blood on my finger? I’m nervous about inserting the cartridge correctly into The COR, have any tips? Do you have a video tutorial for how to check-in? How do I dispose of the lancets and COR Cartridges? I’m having trouble connecting The COR to my WiFi network. Comments 0 comments Please sign in to leave a comment.