I'm on a week with the Walker No Shine contour tape that I've cut to tabs, for a full perimeter attachment - including hairline.
I've worked out 6 of those days, have not shampooed the unit but ran water over my head.

What do I do with lift at the hairline when using tape?

It was my first solo, & I know I didn't stretch/tack it around effectively - it's a tad misaligned & I do have a ripple. But overall - it was on tight + it's a comb down style + + life's too short to rip up a stuck on piece where no one will see the imperfections.