You might need to buff the screen for five minutes or even more before all fingerprints and smudges have been taken off. You might have to wipe down the screen a next time with additional isopropyl alcohol before your screen is totally clean. Buff absent prints with a microfiber cloth. https://www.linkedin.com/posts/anhometech_anhome-keyboard-cleaner-kit-cleaning-tool-activity-7180578955060473856-5DHX?utm_source=share&utm_medium=member_desktop