It's typical, when measuring the SG of a fermenting wine with a hydrometer, to have the CO2 bubbles accumulate on the hydrometer and cause it to float higher and higher as the bubble accumulate. You can't do it with a wine thief, but with a test cylinder, you can cover and shake it to release a lot of that CO2 for a better hydrometer reading.checked today... I noticed bubbles. So its still going.
I took a hydrometer check... IT SHOWNED HIGHER THAN YESTERDAY.
Then I got the idea that it measures not just sugar. After knocking on the wine thief a little bobbles was released and it went to 1.020
Still have to wait.