Webjan 15, 2019 · i started on the g6 a couple of months ago. First 3 insertions went fine, but i had a lot of bleeding with the last 2 and both sensors failed. Dexcom is replacing them. Webpenetrating the blood vessels can cause bleeding. Inserting the sensor too deeply into the body, can also cause bleeding. Be sure you aren’t using excess pressure when applying. Webin order for the dexcom g6 insertion needle to reach the interstitial fluid, it must penetrate the dermis layer of the skin, which has…