Me too. I only ever get a very very faint line but it is usually at the right time (CD12/13), I have EWCM, my cervix is high and soft and temps are low. So I count that as a positive now.
It's a bugger though - I thought it would be the perfect solution to carefully planned BDing to avoid wearing out my poor boy

. Dark line, bonk, baby

We're now up to four days in a row and not sure he can handle anymore.
Although at least I know he'll be a good boy on the stag weekend he's going on tomorrow!!!! Not that I ever thought anything different but he'll be knackered
Hx