@joshua 09, I'm happy to heat cold hard boiled eggs.
My readings were highish today, I ate salad for lunch, chicken and green veg for dinner, went to the gym for two hours and my post dinner 2-hour reading (after 1 hour in the gym) was 10.2! I cannot understand how it went that high. I've just got home, 3 hours after last eating, and tested again - it's 8.2. Not good at all.