I have another OPK question

Even though I am using the smiley test, when you detach the stick you can see the test lines. Does the test line start to darken as you get closer to O? It looks to me like as the days have gone on, the test line seems to be getting darker, just not dark enough to where I get my smiley.

Re: I have another OPK question

It actally does darken. I looked for this last month. HTH