When I first got the Wanhao D8 I was in touch with a customer service guy and he recommended a couple things that surprised me, like 90 to 100 second first layer time, and 25 seconds exposure per layer. That's contrary to everything I've read on resin bottles (the water washable recommends 60 and 8 second times) but it's worked well and I rarely have adhesion problems. But, I've had enough other problems to make up for it. Right now I'm wondering if the long exposure times are clouding my resin tray or something. This weekend I'm replacing the print screen and rebuilding a resin tank so we'll see how that goes, but the print quality I've been getting still has me hopeful.