UP! Perf boards are designed to reduce warping, preventing the lifting of the bottom surface of your 3D build project from the build platform. At the start of the build process plastic seeps into the holes of the Perf board resulting in a strong bond between the build project and the platform
To clean your Perf Board simply scrape both sides free of plastic waste using the scraper provided when your bought your UP! 2 3D printer. There is no need to remove the plastic from the holes.