I've had a few evaporation lines that looked exactly like this with clear blue tests. I'd wait a few more days and then test with a pink dye test instead. ☺️ x
Yeah looks like an evaporation line to me. You can only read them in the time frame x
Id do a digital test to be sure x
It could be an evap line but I would say as when you looked at it it was most likely outside of the time frame I would do another test just to see what comes up then. Try and get a couple of digital tests if possible as I find them more reliable but if too expensive I would get a couple of the dye tests so that you can repeat the tests if need be. X