If printed objects are not sticking to the build plate, try these solutions:
• Re-level your build plate by navigating to Utilities > Level Build Plate on the LCD panel. Inconsistent plate height will lead to inconsistent adhesion. If any one part of your object does not adhere well to the plate, the whole object might peel off the plate. Try leveling the plate again using a thinner piece of paper or feeler gauge to check the distance between the nozzle and the build plate.
• Ensure that the plate is clean. Bubbles, scratches, dust, and oil from your hands can prevent objects from sticking to the Kapton tape. Wipe down the build plate with a clean, lint-free cloth.
• Increase the temperature of the build plate by five degrees. You can change the temperature of the build plate in the Advanced Options section of the Settings dialog in MakerBot Desktop.
• If you continue to have adhesion problems, loosen each of the plate-leveling knobs about a quarter of a turn to bring the plate slightly closer to the nozzles.