I purchased the pack of 100 OPKs and 50 HCG PregMate tests on Amazon for $30. I’ve used them for 3 cycles no problem. Today, I’ve tried to take 3 OPKs and after letting them sit for the time limit, they still have dye stuck in them that doesn’t move all the way across. I let one sit ALL day and it still has dye in the window. I’m following the instructions to a T like I always do. Dip in urine (not past the max line) for 5 seconds, lay test flat, read in 5 minutes, all per the box instructions. No matter how long I wait, the dye stays in the window and makes it difficult to read. I just don’t understand how they were all fine for 3 cycles, including the last 4 days I’ve used them, and now they do this.

Normally (from previous cycle):

Now (all 3 tests today):