For what you’re going to spend on that stuff, just get YoYoJam thin lube.
OK, onto the bearing coming out so easily:
Yes. I have several DM2’s and they all come out super easy. In fact, all my YoYoJam yoyos, the bearings out out just as easily as you are experiencing.
Simply substitute the solvent of choice(in your case, the Zippo Lighter Fluid) and then otherwise, repeat the steps.
At 2 months, a 40 second sleeper is more than sufficient. Your throw itself will continue to improve and get stronger and straighter and hence, your sleep times will get longer and longer. Just keep in mind that a sleeper is not an accurate indicator of “usable play time” though. Really, if you can get through whatever trick you’re trying to do, and/or any combos you’re working on, you’ve got more than sufficient sleep time. Honestly, nearly any string trick yoyo is capable of more than adequate sleepers these days, provided they are thrown properly. My sleep times are usually over 3 minutes, which considering any combos I do or stuff between binds is usually less than 30 seconds(often much less), I’m fine. My issues are from landing clean.
Also, keep in mind that unless you’re using Dry Play(which requires acetone), any lube will slow down your bearing. If you’re using lube very sparingly, this really won’t be a big deal: a few seconds. That’s not enough to make a difference. Lube is merely to prevent the bearing from wearing down, not increase spin times. How you do things is up to you. Many people run their bearings dry and have had little to no problems or issues.