clearblue ovulation kit

need some help ladies. yesterday I tested and had my peak LH surge. because I have so many test wands i tested with 2 previous used wands, why? well I'm nutty that way 😁. anyway this morning I used a brand new twst wand and got a big goose egg. do you think it's because my surge is over or because it was a new test wand? anyone else have this issue? I might be the only one that continues to test even after getting a solid 😁 ***update**** tested again this evening with a new this morning test wand (again that's how i roll). it's showing high ...blinking 😁. maybe I do need to use a new test wand every month?!?!