Low Alcometer / Proof and Tralle Hydrometer Reading in Wash

[tonofsteel]

Made up a 25L kale sugar wash with 5.5kg sugar.
Starting SG was around 1.08 and finishing was below 1.00 but not by much.
Left it go for two weeks and when the SG would not drop any lower cleared it and racked it into another fermenter.

I had an air lock on it, was about 24C most of the two weeks.

So now I used a alcometer to test the wash and it is telling me that I have 0-2% ABV in there.

It appears that after racking it a week ago I put the lid on the fermenter but did not push down to snap fit it closed. So it was not openly exposed to air but it also was not a tight seal. Is it possible that 80-100% of the alcohol evaporated off in that period of time? I tasted it and it tastes like wine and not vinegar at all. The ambient temperature is around 20-22C so kind of cold to think rapid evaporation would occur.

Never had this happen before, did not even see the need to check the final wash %ABV since it has always worked out if I get the SG right from start to finish.

Anyone ever have this happen?

Edit: Changed the subject to hopefully make my example easier for others making the same mistake to find