adding a poly-edge to a full lace cap?

[AGAssi]

Hello,
is it possible (and realistic) to add a thinskin edge around the perimeter to a full lace system? Is there a certain product I can use for this effort?

I want to achieve:

1. the tape (currently blue liner tape along the perimeter) being better protected from showering, so it wouldn't break down so quickly. In my cases, after 6 times of showering the famous blue liner tape (stuck directly underneath the lace) becomes very gooey. So with poly edge, maybe the are longer wearing-times possible

2. also protect the hair in the respected taped areas from becoming full of glue when the tape is breaking down there. I suppose clean-up could be easier then.

=> Alternatively, can anyone show me the ULTIMATE way to get rid of any glue residue? (on the lace and IN THE HAIR). I tried alcohol, oils... mirrow slide... and shampooing A LOT, but since I've been wearing 7 days in a row, the residue cumulates from one attachment to another, no way to get rid of it. Really not a nice sight

3. especially in the nape area (I wear a full cap) there is IMMENSE shedding (of the hairpiece) where the tape was. From attachment to attachment these areas become more and more itchy (more than in areas where the tape is covered by hair). I also guess, a PU layer between tape and lace/knots could prevent from this effect of shedding?