First fix the blade on the tip of electric soldering iron. When the tool is hot, then you can clean most of OCA LOCA residual adhesive glue and polarized film on the surface of LCD touch screen digitizer for iPhone4/4s/5, Samsung series, HTC and other cell phone. At last, you can use alcohol or other solvent to clean residue adhesive.

When you master the skill, the operation speed is fast.  http://www.phonerepairdevice.com/