CBEFM Sticks Question

I have leftover sticks from many different boxes from all my months of testing. I know it says I can use in batches of 10. I usually don't O until about CD18-20.

Has anyone ever switched lot numbers in the middle of a cycle after only using 10 from a box? I am so nervous to do this and that it will mess up my O but I have so many sticks I hate to see go to waste. They are not cheap!

TIA

Re: CBEFM Sticks Question

i've definitely used some from an old box and some from a new... i'm not throwing $ down the drain