Why don't all test have them?

Question

Took a test a month ago, and hid it from my husband so I forgot to throw it away, but took a test last night and this morning and they had evaps but the one from last month didnt🤷 I just wanna know why all tests don't have evaps

Answer

All tests have the possibility of producing evaps. Multiple factors go into why some end up with them and some don’t, including storage of the tests during transport or before use.
If it’s after the allotted time frame, it’s invalid. There’s no sense in looking at them once they’ve past that deadline.

Why don't all test have them?

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