I think that looks pretty damn good!
You've got the positioning just right.
It just looks like your hair has thickened.
I couldn't even tell you where the piece starts & stops!
You've done a BRILLIANT job.

AS for the C22, they do contains some oils so rinsing & an amount of shampooing is advisable because otherwise you'll find the reattachment difficult or at best less efficient.

If you ever wanted to clean the lace of glue and not shampoo, you need a glue solvent that won't smell as nice & evaporates.
Pure alcohol does this.
Lighter fluid ( as in the fluid you might use to fill a Zippo lighter) also does this.
Its not recommended to get on the skin though.