1- Make sure the hair underneath the piece, is shaved or trimmed. Do people here shave with a razor or buzz down? I personally just use a razor.

2-What tapes/glue are you using now?

When I get an itch I use the teeth from a comb and just press into the piece. I don't get itchyness so much nowadays, but I need to experiment with antiperspirants or I will try a bit of hairspray on the scalp before I attach.