I think it's time for me to spend the money and buy more accurate OPK. I just started yesterday using a generic kit I bought that is the 20 strips. I got kind if excited this morning because it looked like 2 lines, but the control was really light. So I did it again. Control was super bright, but no sign of LH line. Oh, and here's when I hope I can give you a giggle--I noticed on the tube of strips that it says it expired 8/2012. WHOOPS. ​