Some important things to do before and during re-assembly with a new digitizer:
1. Clean out ALL remaining glue/duct tape from the frame (I use a cotton swab and some gasoline)!
2. Check for sufficient duct tape on your new digitizer
3. Check to sufficiently insulate the conductor tracks (the bronze lining) on your new digitizer or you’ll most likely have ghost movements after re-assembly. E.g. insulation tape
4. Keep some super glue gel (NOT the liquid - use the GEL) ready and apply some shortly before re-assambly on the right side of the frame where the cables connect the digitizer to the Logicboard => The tape area is most likely too small on this edge to create an efficient enough bonding. The stiff cables often push the digitizer from the inside. To be safe so your new glas wont lift up, apply the superglue gel in this area.
5. After re-assembly heat the frame along the edges with a heatgun and use clips to hold the glas down with some pressure. Let it cool out with the clips on so the glue/tape bonds nicely.