Ok so just tested my blood before bed and after having 2 strawberries and a few raspberries with lots of double cream about 1.5 hrs ago .. reading. Amel up 7.1 from a reading after dinner of 4.9 . Now this was a shock as I have never been that high since I started testing . Even after strawberries and raspberries . So I tested twice more within a minute of the 7.1 and got 2 readings of 6.1 and 4.9 . So now I don’t know what to believe from this meter . Any suggestions or reasons for this
If your meter is new it should be accurate to 15%, so for example:
If the true value is 6, your meter could read between 5.1 and 6.9. That's very close to the range you got, but your readings fell just outside this range.
If your meter is older it should be accurate to 20%, so for example:
If the true value is 6, your meter could read between 4.8 and 7.2. That's very close to the range you got, and your readings are inside this range.
The samples of blood are also no likely to have precisely the same 'ingredients'(!) between readings, so all in all, it could be that everything is working fine, and it just goes to show the importance of multiple readings and taking an average if you really want to be sure. In theory, since your readings were at both extreme ends of the accuracy range, you 'true' reading should be about 6, if your meter is working.
As
@Rachox says, one reason for the blood 'ingredients' not being the same could be because of contaminants on your skin.