Thank you. You are the second person to share your experience putting a new one on while in the grace period of the old, which is something I am going to do. The only problem I can foresee with using my arms is having a hard time applying the overpatch.
I’ve been CGM’ing with Dexcom since they first came out (DexcomSeven - maybe 2008?) Anyway I where my sensors all over the place, upper arm, forearm, upper chest, love handles, abdominal area, thighs. We have to remember that anything - especially from the company - that shows application has to use the body part used in FDA process.
Dexcom has published a summary of the paper “Preserving Skin Integrity with Chronic Device Use in Diabetes” on their “For professionals” site that mentions using IVPrep. While the summary was created pre-G7 Dexcom changed the G6 adhesive to what they are using on the G7 last year so everything should still apply to the G7.
I have had only one failure in applying the overpatch and called Dexcom to see if they had overpatches for the G-7. No, they don’t and they sent me out a new G-7. Just go slowly and carefully (and practice yoga 
)
Always put it on my upper right arm, move it around within a 6-inch diameter so it’s not in the very same spot repeatedly. It’s very accurate and the 30-minute warm up is a dream. Still have some G6 to get through which is a bit of a drag but oh well!
Today was my first time ever inserting it. Since I thought using two hands would be easier to get the feel of it, I put it on my abdomen. I was surprised it was painless. After I get used to doing a few I may switch to my arm. Thank you for sharing.
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Am glad it was so easy and good for you @Patticakes. Yay! 
Thank you, Sheryl. 
I have now been wearing my Dexcom G7 for 30 hours. At first it seemed great with readings close to what my fingersticks indicated. However, last night I started getting notifications that my glucose was heading dangerously low. Being new to this, I believed it and started eating. The notifications kept coming with lower numbers. I ate more. Then I realized I should be doing the fingersticks and my readings were higher than the CGM. After a 300+ fingerstick I started infusing insulin. Then I calibrated the CGM, twice. All throughout the night there were no notifications. This morning my sugar was 200 with a fingerstick and lower by about 40 points on the CGM. Today wasn’t bad. The difference between the two was about 40 points but nothing high or low. Now, after eating a plateful of spaghetti for dinner, I’m getting alarm notices of urgent low soon, 65 and heading down. Just checked with my glucose meter and I’m at 89. This is all driving me nuts. So far, I don’t see a huge advantage to having a CGM, but I’m assuming since I’m new to this, I just don’t know what I’m doing and have to learn how it works.
Yes, it does take a few weeks to come to terms with your new device. With time and patience, you should soon learn how to live with it usefully, sort of happily ever after, or at least until the next iteration arrives with its foibles. You will learn when best to pre-bolus and which foods spike you one hour later vs. which foods take three hours to kick in. The best tip I can give you is to never calibrate, at least not for the first month or so, as that just adds one more level of complexity to deal with. Let it run its course, and I think you will find that it will self-adjust to your finger sticks faster than using calibrations.
To complicate matters, this is a horrendous time of the year between the recent one-hour time change and average temperature changes this time of year that raise havoc on BG control for most of us for a couple to three weeks or so.
Thank you for the encouragement! I will take your advice to skip the calibrations and see what happens.
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I use a very old IPhone 7+. On your phone got to “settings” “Battery”. “Battery Health “. If it 60% or less time to get a new battery. I was surprised. For a long time mine said 80%. Then one day it said SERVICE. The Apple Store replaced for $60.00. Far cheaper then a new phone
Also in the same field is the battery usage by app. On my phone Dexcom uses 11% Dexcom Follow 2%. Clarity 2% and my sugar pixel hub 5%
Wow. Mine says “Service” now also. It’s at 79%. My phone is the most basic model, SE, so I will find out if they even replace batteries in this phone. Thank you for sharing, John.
There are two models of the SE. 2016 & 2020. You can get battery replacement kits for both. $30.00. Google, Apple SE Battery Replacement. But if you attempt it and blow it you’re buying a new phone. Best bet is to have it done at an Apple Store. They did tell me upfront that since my phone was 17yrs old that it might work. Hooray it did. $60.00. Far far cheaper than a new phone. I’ve been with Dexcom sense the G-4. You may also want to look up Sugar Pixel on line. It’s a clock like device they displays your glucose level in different formats . I use it so I don’t have to keep checking my phonr
Thank you, John. Since I’m not the best with technology, I will just take my phone to the store for a battery replacement. Sugar Pixel sounds interesting. I may have to go take a look.