Evaps on 4 test?

jane
 I have take test everyday since 9 dpo ( 11 dpo now) and I've used blue dye test and all of them get a faint blue line a little bit after 10 minutes.  I took a frer and cheapie dollar tree one and  they had a faint line a little after 10 minutes too . I know I'm not suppse to watch them after the ten minute mark but I can't help but wonder are they alll really evaps.

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