dollar tree versus first response

P

just wondering if anyone has had similar experience.... I used my last FRER sunday (af 2 days late) fmu and got this and many have confirmed vvvvvvfl

now I've used dollar tree the last couple days and see nothing. this is today af 5 days late fmu...

shouldn't the lines get darker? maybe a bad batch of DT tests? Going to get more FRER later today anyways but was just curious.