Thank you both for replying.
Rabid- they are stored in a cupboard in my utility room, guessing temps range from 9/10 - 19/20degrees. The ones that hatch are normally on the right day, however a couple come a day late.
Yes my incubator is running at 38.2 and is a fan incubator. I will try turning it down slightly.
Jok - i put an 8 unwashed eggs in on Sunday evening to test to see what happens. I have made a candler stand that attaches to my phone case, not the best but can make out that 3 out of 8 have the embryo and veins formed, 3 are clear with no yolk and 2 have a yolk but no signs of