Ruth brought me her meter in a sandwich bag. She set it on my kitchen table, next to the Sunday pill organiser, and said it had been lying to her since Easter. The lancet drum was still full. She had been pricking her finger four times a day and writing nothing down, and the numbers she remembered had her half scared to eat.
How to keep your memory steadyThe video explains what to do about memory slips after sixty.
I made tea. We looked at the meter together, and the first thing I asked was not about the numbers at all. It was about when she washed her hands.
The Finger You Just Washed
Here is something most people are never told. A home meter reads a drop of blood, and that drop is easy to spoil. If your hands are damp, the water thins the drop. If you peeled an orange or buttered toast an hour ago and washed carelessly, the sugar on your skin rides along into the reading. I have seen a reading come back high from nothing more than an unwashed apple hand.
Warm water, soap, dry well. That is the whole trick. Cold fingers bleed poorly, so people squeeze, and squeezing pulls fluid from the tissue into the drop and bends the number the other way.
At the senior centre on Elm Street I keep a running note on blood sugar and memory, because the two meet more often than folks expect. The brain is a greedy organ. That is a teaspoon of sugar, give or take, keeping the whole operation running. When the supply wobbles, the brain is the first to complain, and it complains in fog and forgotten names before it complains any other way.
Four Grams in the Whole River
Let me walk you through one ordinary day with real numbers, because the numbers are calmer than the rumours.
Say Ruth tests before breakfast on a Tuesday in March. Her fasting reading is 112 mg/dL.
She eats oatmeal and a banana. Two hours later she tests again: 164.
Now the other end. Write those two thresholds on the inside of the logbook cover. They are the only two you need to hold in your head.
The Logbook with Coffee Rings
Ruth’s real problem was not her meter. It was her memory of her numbers, which is the least accurate instrument in any house. She recalled a 190 from February. The meter’s memory, when we scrolled back through it, said the highest reading in three months was 171, after a birthday dinner.
My advice to her was the same I give anybody: the paper holds the memory so you can let yours rest. I keep my own house the same way — the names notebook by the calendar, the cuff in the hall drawer, the Sunday organiser. What is written down stops being a worry and starts being a pattern.
She said, “So I’m not going blind, then.” I said, “I can’t tell you anything like that. I can tell you this bag of numbers is not the story you thought it was.” She said, “Walt was right, I should have brought it weeks ago.” I did not know she knew my Walt. Small towns.
It is the same lesson as checking your pulse at home or taking a pressure reading: the number is only as good as the conditions around it, and one reading is a weather report, not a climate. The brain feels the climate — the long run of sugar and pressure together — more than any single storm. That is why my note on how sugar, pressure, heart and brain connect lives right next to the sugar pages.
The Bottle of Strips that Expired
Now the thing that went wrong, because something always goes wrong. Ed tested faithfully for a year and brought me a logbook full of beautiful numbers. Every one between 90 and 140. His doctor’s lab work said otherwise.
He had bought them in bulk to save money and stored them in the bathroom, where the shower steam got at the vial. Test strips are chemistry in a flat little tongue, and chemistry ages. A year of confident readings, all of them wrong, and an actual problem left unattended for twelve months because of it. That is what it cost: a year.
Check the date on the vial. The meter is only as honest as the strip you feed it.
The Myth of the Steady Line
The myth: your blood sugar is a number, like your height, and a good person keeps it at one calm figure all day.
What actually happens: it is a tide, not a fencepost. It rises after food, dips before it, shifts with sleep, stress, illness, and a walk around the block.
The people who suffer most at my table are not the ones with wild numbers. They are the ones who test eight times a day chasing a flat line that no human body has ever produced, and wear themselves out with alarm. Adjust just one variable, then let six weeks pass before you render a verdict — that practice has never once let me down, whether at the counter or at the centre.
The newer way, the sensor worn on the arm that reads continuously, has been around since about 2015, and it shows the tide in full — some people find that a comfort and some find it one more thing to fret over.
Here is how I do it, when I do it:
How I go about it, in order
- Wash and dry, warm water, no squeezing
- Same times each day, not random ones
- Write it down with the time and what was eaten
- Check the strip date the first of every month
- Bring the logbook, not the memory, to the appointment
The last step matters most, because the pattern is the point. A single reading tells you almost nothing. Six weeks of readings tells your doctor nearly everything. And if you are testing because you have noticed your thinking feels sticky some afternoons — foggy, slow on names — that is worth saying out loud at the appointment too.
The piece most people miss is the connection — why a wobbling sugar shows up first as a lost word or a misplaced Tuesday. Go watch the memory slip cause and fix video before you test again tomorrow; it lays out what is usually behind those slips and what actually helps, and it will change which numbers you bother to chase.
Tonight, before bed, take your strip vial out of the bathroom and put it in a dry drawer. That is all. The rest can wait for morning.