Steph .... my OPKs also say that you're meant to let the wee get to room temp, which I did for the first few times .... but i don't bother now! And I still get results! I test between 3 and 8pm usually... and always get + ok. I can't always test at the same time due to work .. so sometimes I do 2 in a day to make sure I've covered myself!
