1. Original instructions here: http://fpvlab.com/forums/showthread.php?40059-Fixing-Xiaomi-Yi-Out-of-Focus-Problem&p=785731#post785731 [http://fpvlab.com/forums/showthread.php?40059-Fixing-Xiaomi-Yi-Out-of-Focus-Problem&p=785731#post785731] 2. Instead of only using a knife to remove the hot glue, I highly recommend using Rubbing Alcohol (Isopropyl Alcohol) http://lifehacker.com/5676237/use-rubbing-alcohol-to-remove-hot-glue-from-nearly-anything a.