Heat and insulin

Has it ever happened to you that with heat even protecting insulin in some case, it seems that it makes less effect?It has happened to me a couple of times and I don't know if it is a defect of the Penflex (the pen dosing) or is due to heat ...

Where do you keep it?

In a case.It is not a refrigerator.But when I go to the beach for example if I keep the case in the fridge

The best is the cold wallet.

I think the same as @regina.

Anyway, I have not noticed changes of values ​​for days of more heat ...

In the section of "Experiences with Diabetes", there is a topic of mine called insulin and heat, of July, in which I comment on this matter.I refer you to it to avoid repetition.
Greetings.

Here I copy the link to the theme that @Miguel makes reference, it is easier to find it!;-)

https://www.diabetesforo.com/discusion/10132/insulina-y-calor

Insulin and heat
This issue that I raise is already known for all of you, but in case someone is good for this experience, I wanted to comment.

We know that insulin must be saved refrigerated, except for the "boli"...