Ok so I have some eBay cheapy OPK's and the control line never seems to be very dark. My cycles are all over the place at the moment so I am trying to confirm when i ovulate with the opk's. The last few days the test line has almost been the same as the control line, but both are still fairly faint. So I don't know if I am going to ovulate or the tests are just crap.
Anyone else had this problem?

ETA: I don't have any ovulation symptoms (though I don't get many usually)