Ever since I started using my wine thief, I've noticed that both my OG and FG readings are higher than anticipated, so I wanted to throw a couple things out there. In the past, I had used a turkey baster to remove samples and I then measured in the hydrometer tube. The baster fell apart and the tube required a relatively large sample, so I went with the thief. But, alas, the readings seem to be off. My earlier batches were all hitting very close to my target FG, but I've not been hitting it lately; despite the seemingly high numbers though, the taste and feel of my beers has been great. And I can guarantee that the alcohol isn't too low. Also, this has been the case regardless of pitch rate; even when I was only pitching 1 packet I was hitting FG. Now with 2 or 3 I'm still not getting there. My initial thought was that the OG samples could be high because I didn't stir well and the thief was pulling from the "heavier" part of the wort. But that difference should be diminished in the fermented product, which hasn't been the case. So I'm thinking that the decreased diameter of the thief, relative to the original hydro tube, is the culprit. Any bubbles in a smaller space would create more buoyancy, right? And I've also read that the electrostatic attraction from glass to plastic can also throw off the readings. For whatever reason, I haven't checked it against plain water to make sure it's accurate, but I'm looking for some thoughts. I may just opt to use the thief to gather and the old tube to measure.