Faulty wondfos?

Sarah • Hailey Jean 11/1/19💗🌈 God is good 🙌🏻

Hi all! I just ordered wondfos from amazon. After testing last night and this morning, I noticed a trend. Most of my sticks were showing nothing. Like pictures below. I had two vvvfl on FRER and a blue dye and nothing on Wondfo. Anyone have the same experience? I feel like I don’t trust them if half the sticks are coming up faulty. Opinions? Feedback?