Evap lines?

Hi everyone. 🥰 I’m curious about people experience about having multiple Evap lines with clear blue tests? I tested yesterday morning looked neg. Tested this morning looked neg. Went to empty rubbish saw a blue line ? Now it was outside the time line fair enough. But then I looked at yesterday mornings test and same line ?? Unlikely it’s positive right ???? What are peoples experiences with clear blue are they prone to this ? I’ll be texting in the morning again.