I set my bed height and clean the glass with alcohol before each print and I don't have too much troubles. If I get fingerprints all over the glass or I let a layer of dust settle on the print bed it doesn't like to stick so much. If it is a print with a smaller area directly contacting the glass, then I will make a .2mm high patch right next to my print just to create more surface area to bite to the printer glass. and the .2mm easily cuts off the print with an exacto knife. I have also done well keeping print speeds down so as to keep the bed from shaking or changing directions and speeds to fast.